diff --git a/docs/assets/js/search.js b/docs/assets/js/search.js
index cd8670c..f1fa60f 100644
--- a/docs/assets/js/search.js
+++ b/docs/assets/js/search.js
@@ -1,3 +1,3 @@
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diff --git a/docs/classes/algorithm.html b/docs/classes/algorithm.html
index a6efbc8..fdca035 100644
--- a/docs/classes/algorithm.html
+++ b/docs/classes/algorithm.html
@@ -1066,7 +1066,7 @@ <h3><span class="tsd-flag ts-flagStatic">Static</span> find<wbr>Weakly<wbr>Conne
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Algorithm.ts#L15">Algorithm.ts:15</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Algorithm.ts#L15">Algorithm.ts:15</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1113,7 +1113,7 @@ <h3><span class="tsd-flag ts-flagStatic">Static</span> get<wbr>Neighbors</h3>
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Algorithm.ts#L63">Algorithm.ts:63</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Algorithm.ts#L63">Algorithm.ts:63</a></li>
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diff --git a/docs/classes/genericgraphadapter.html b/docs/classes/genericgraphadapter.html
index 63bdf80..321c74d 100644
--- a/docs/classes/genericgraphadapter.html
+++ b/docs/classes/genericgraphadapter.html
@@ -1234,7 +1234,7 @@ <h3>add<wbr>Edge</h3>
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 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#addedge">addEdge</a></p>
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+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L269">GenericGraphAdapter.ts:269</a></li>
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 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1264,7 +1264,7 @@ <h3>add<wbr>Vertex</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#addvertex">addVertex</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L302">GenericGraphAdapter.ts:302</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L302">GenericGraphAdapter.ts:302</a></li>
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@@ -1288,7 +1288,7 @@ <h3>can<wbr>Add<wbr>Edge</h3>
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 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#canaddedge">canAddEdge</a></p>
 							<ul>
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+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L241">GenericGraphAdapter.ts:241</a></li>
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 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1315,7 +1315,7 @@ <h3>can<wbr>Contract<wbr>Edge</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#cancontractedge">canContractEdge</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L122">GenericGraphAdapter.ts:122</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L122">GenericGraphAdapter.ts:122</a></li>
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 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1342,7 +1342,7 @@ <h3>clone</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/clonableadapter.html">ClonableAdapter</a>.<a href="../interfaces/clonableadapter.html#clone">clone</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L116">GenericGraphAdapter.ts:116</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L116">GenericGraphAdapter.ts:116</a></li>
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 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1369,7 +1369,7 @@ <h3>contract<wbr>Edge</h3>
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 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#contractedge">contractEdge</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L126">GenericGraphAdapter.ts:126</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L126">GenericGraphAdapter.ts:126</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1402,7 +1402,7 @@ <h3>delete<wbr>Edge</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#deleteedge">deleteEdge</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L310">GenericGraphAdapter.ts:310</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L310">GenericGraphAdapter.ts:310</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1429,7 +1429,7 @@ <h3>delete<wbr>Vertex</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#deletevertex">deleteVertex</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L325">GenericGraphAdapter.ts:325</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L325">GenericGraphAdapter.ts:325</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1453,7 +1453,7 @@ <h3>get<wbr>Edge<wbr>Count</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getedgecount">getEdgeCount</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L216">GenericGraphAdapter.ts:216</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L216">GenericGraphAdapter.ts:216</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">number</span></h4>
@@ -1471,7 +1471,7 @@ <h3>get<wbr>Edge<wbr>Data</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getedgedata">getEdgeData</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L154">GenericGraphAdapter.ts:154</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L154">GenericGraphAdapter.ts:154</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1501,7 +1501,7 @@ <h3>get<wbr>Edge<wbr>Data<wbr>From</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getedgedatafrom">getEdgeDataFrom</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L186">GenericGraphAdapter.ts:186</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L186">GenericGraphAdapter.ts:186</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1525,7 +1525,7 @@ <h3>get<wbr>Edge<wbr>Data<wbr>To</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getedgedatato">getEdgeDataTo</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L170">GenericGraphAdapter.ts:170</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L170">GenericGraphAdapter.ts:170</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1549,7 +1549,7 @@ <h3>get<wbr>Edges</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getedges">getEdges</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L205">GenericGraphAdapter.ts:205</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L205">GenericGraphAdapter.ts:205</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Iterator</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">Pair</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">&gt;</span></h4>
@@ -1567,7 +1567,7 @@ <h3>get<wbr>Edges<wbr>With<wbr>Data</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getedgeswithdata">getEdgesWithData</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L210">GenericGraphAdapter.ts:210</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L210">GenericGraphAdapter.ts:210</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Iterator</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">Triple</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">Maybe</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TEdgeData</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">&gt;</span></h4>
@@ -1585,7 +1585,7 @@ <h3>get<wbr>Edges<wbr>With<wbr>Data<wbr>From</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getedgeswithdatafrom">getEdgesWithDataFrom</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L178">GenericGraphAdapter.ts:178</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L178">GenericGraphAdapter.ts:178</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1609,7 +1609,7 @@ <h3>get<wbr>Edges<wbr>With<wbr>Data<wbr>To</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getedgeswithdatato">getEdgesWithDataTo</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L162">GenericGraphAdapter.ts:162</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L162">GenericGraphAdapter.ts:162</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1633,7 +1633,7 @@ <h3>get<wbr>Order</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getorder">getOrder</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L224">GenericGraphAdapter.ts:224</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L224">GenericGraphAdapter.ts:224</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1657,7 +1657,7 @@ <h3>get<wbr>Predecessors<wbr>Of</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getpredecessorsof">getPredecessorsOf</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L142">GenericGraphAdapter.ts:142</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L142">GenericGraphAdapter.ts:142</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1681,7 +1681,7 @@ <h3>get<wbr>Successors<wbr>Of</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getsuccessorsof">getSuccessorsOf</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L134">GenericGraphAdapter.ts:134</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L134">GenericGraphAdapter.ts:134</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1705,7 +1705,7 @@ <h3>get<wbr>Vertex<wbr>Count</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getvertexcount">getVertexCount</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L228">GenericGraphAdapter.ts:228</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L228">GenericGraphAdapter.ts:228</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">number</span></h4>
@@ -1723,7 +1723,7 @@ <h3>get<wbr>Vertices</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getvertices">getVertices</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L150">GenericGraphAdapter.ts:150</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L150">GenericGraphAdapter.ts:150</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Iterator</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">&gt;</span></h4>
@@ -1741,7 +1741,7 @@ <h3>has<wbr>Edge</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#hasedge">hasEdge</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L232">GenericGraphAdapter.ts:232</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L232">GenericGraphAdapter.ts:232</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1768,7 +1768,7 @@ <h3>has<wbr>Vertex</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#hasvertex">hasVertex</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L237">GenericGraphAdapter.ts:237</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L237">GenericGraphAdapter.ts:237</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1792,7 +1792,7 @@ <h3>is<wbr>Reachable</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#isreachable">isReachable</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L130">GenericGraphAdapter.ts:130</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L130">GenericGraphAdapter.ts:130</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1819,7 +1819,7 @@ <h3>map</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/clonableadapter.html">ClonableAdapter</a>.<a href="../interfaces/clonableadapter.html#map">map</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L84">GenericGraphAdapter.ts:84</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L84">GenericGraphAdapter.ts:84</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-type-parameters-title">Type parameters</h4>
@@ -1854,7 +1854,7 @@ <h3>set<wbr>Edge<wbr>Data</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L194">GenericGraphAdapter.ts:194</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L194">GenericGraphAdapter.ts:194</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1884,7 +1884,7 @@ <h3>supports<wbr>Order</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#supportsorder">supportsOrder</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L220">GenericGraphAdapter.ts:220</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L220">GenericGraphAdapter.ts:220</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">boolean</span></h4>
@@ -1901,7 +1901,7 @@ <h3><span class="tsd-flag ts-flagStatic">Static</span> create</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GenericGraphAdapter.ts#L55">GenericGraphAdapter.ts:55</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GenericGraphAdapter.ts#L55">GenericGraphAdapter.ts:55</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
diff --git a/docs/classes/graphlibadapter.html b/docs/classes/graphlibadapter.html
index 810beb2..150df96 100644
--- a/docs/classes/graphlibadapter.html
+++ b/docs/classes/graphlibadapter.html
@@ -1201,7 +1201,7 @@ <h3>graph</h3>
 				<div class="tsd-signature tsd-kind-icon">graph<span class="tsd-signature-symbol">:</span> </div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L213">GraphlibAdapter.ts:213</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L213">GraphlibAdapter.ts:213</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
@@ -1225,7 +1225,7 @@ <h3>add<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L237">GraphlibAdapter.ts:237</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L237">GraphlibAdapter.ts:237</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1254,7 +1254,7 @@ <h3>add<wbr>Vertex</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L266">GraphlibAdapter.ts:266</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L266">GraphlibAdapter.ts:266</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1277,7 +1277,7 @@ <h3>can<wbr>Add<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L217">GraphlibAdapter.ts:217</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L217">GraphlibAdapter.ts:217</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1303,7 +1303,7 @@ <h3>can<wbr>Contract<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L88">GraphlibAdapter.ts:88</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L88">GraphlibAdapter.ts:88</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1329,7 +1329,7 @@ <h3>clone</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L82">GraphlibAdapter.ts:82</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L82">GraphlibAdapter.ts:82</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1373,7 +1373,7 @@ <h3>contract<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L92">GraphlibAdapter.ts:92</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L92">GraphlibAdapter.ts:92</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1405,7 +1405,7 @@ <h3>create<wbr>Vertex</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L261">GraphlibAdapter.ts:261</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L261">GraphlibAdapter.ts:261</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1428,7 +1428,7 @@ <h3>delete<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L274">GraphlibAdapter.ts:274</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L274">GraphlibAdapter.ts:274</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1454,7 +1454,7 @@ <h3>delete<wbr>Vertex</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L282">GraphlibAdapter.ts:282</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L282">GraphlibAdapter.ts:282</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1478,7 +1478,7 @@ <h3>get<wbr>Edge<wbr>Count</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getedgecount">getEdgeCount</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L128">GraphlibAdapter.ts:128</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L128">GraphlibAdapter.ts:128</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">number</span></h4>
@@ -1495,7 +1495,7 @@ <h3>get<wbr>Edge<wbr>Data</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L170">GraphlibAdapter.ts:170</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L170">GraphlibAdapter.ts:170</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1521,7 +1521,7 @@ <h3>get<wbr>Edge<wbr>Data<wbr>From</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L143">GraphlibAdapter.ts:143</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L143">GraphlibAdapter.ts:143</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1544,7 +1544,7 @@ <h3>get<wbr>Edge<wbr>Data<wbr>To</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L162">GraphlibAdapter.ts:162</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L162">GraphlibAdapter.ts:162</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1568,7 +1568,7 @@ <h3>get<wbr>Edges</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getedges">getEdges</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L186">GraphlibAdapter.ts:186</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L186">GraphlibAdapter.ts:186</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Iterator</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">Pair</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">&gt;</span></h4>
@@ -1586,7 +1586,7 @@ <h3>get<wbr>Edges<wbr>With<wbr>Data</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getedgeswithdata">getEdgesWithData</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L191">GraphlibAdapter.ts:191</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L191">GraphlibAdapter.ts:191</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Iterator</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">Triple</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">Maybe</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TEdgeData</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">&gt;</span></h4>
@@ -1603,7 +1603,7 @@ <h3>get<wbr>Edges<wbr>With<wbr>Data<wbr>From</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L132">GraphlibAdapter.ts:132</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L132">GraphlibAdapter.ts:132</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1626,7 +1626,7 @@ <h3>get<wbr>Edges<wbr>With<wbr>Data<wbr>To</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L151">GraphlibAdapter.ts:151</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L151">GraphlibAdapter.ts:151</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1649,7 +1649,7 @@ <h3>get<wbr>Order</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L204">GraphlibAdapter.ts:204</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L204">GraphlibAdapter.ts:204</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1672,7 +1672,7 @@ <h3>get<wbr>Predecessors<wbr>Of</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L108">GraphlibAdapter.ts:108</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L108">GraphlibAdapter.ts:108</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1695,7 +1695,7 @@ <h3>get<wbr>Successors<wbr>Of</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L100">GraphlibAdapter.ts:100</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L100">GraphlibAdapter.ts:100</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1719,7 +1719,7 @@ <h3>get<wbr>Vertex<wbr>Count</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getvertexcount">getVertexCount</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L124">GraphlibAdapter.ts:124</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L124">GraphlibAdapter.ts:124</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">number</span></h4>
@@ -1737,7 +1737,7 @@ <h3>get<wbr>Vertices</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getvertices">getVertices</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L182">GraphlibAdapter.ts:182</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L182">GraphlibAdapter.ts:182</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Iterator</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">&gt;</span></h4>
@@ -1754,7 +1754,7 @@ <h3>has<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L116">GraphlibAdapter.ts:116</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L116">GraphlibAdapter.ts:116</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1780,7 +1780,7 @@ <h3>has<wbr>Vertex</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L120">GraphlibAdapter.ts:120</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L120">GraphlibAdapter.ts:120</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1803,7 +1803,7 @@ <h3>is<wbr>Reachable</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L96">GraphlibAdapter.ts:96</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L96">GraphlibAdapter.ts:96</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1829,7 +1829,7 @@ <h3>map</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L41">GraphlibAdapter.ts:41</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L41">GraphlibAdapter.ts:41</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-type-parameters-title">Type parameters</h4>
@@ -1864,7 +1864,7 @@ <h3>set<wbr>Edge<wbr>Data</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L174">GraphlibAdapter.ts:174</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L174">GraphlibAdapter.ts:174</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1894,7 +1894,7 @@ <h3>supports<wbr>Order</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#supportsorder">supportsOrder</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L200">GraphlibAdapter.ts:200</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L200">GraphlibAdapter.ts:200</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">boolean</span></h4>
@@ -1911,7 +1911,7 @@ <h3><span class="tsd-flag ts-flagStatic">Static</span> create</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/GraphlibAdapter.ts#L19">GraphlibAdapter.ts:19</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/GraphlibAdapter.ts#L19">GraphlibAdapter.ts:19</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-type-parameters-title">Type parameters</h4>
diff --git a/docs/classes/multigraphadapter.html b/docs/classes/multigraphadapter.html
index 1497433..6bd9fce 100644
--- a/docs/classes/multigraphadapter.html
+++ b/docs/classes/multigraphadapter.html
@@ -937,6 +937,9 @@
 				<li class=" tsd-kind-method tsd-parent-kind-class">
 					<a href="multigraphadapter.html#cancontractlabelededge" class="tsd-kind-icon">can<wbr>Contract<wbr>Labeled<wbr>Edge</a>
 				</li>
+				<li class=" tsd-kind-method tsd-parent-kind-class">
+					<a href="multigraphadapter.html#cancontractoneedge" class="tsd-kind-icon">can<wbr>Contract<wbr>One<wbr>Edge</a>
+				</li>
 				<li class=" tsd-kind-method tsd-parent-kind-class">
 					<a href="multigraphadapter.html#clone" class="tsd-kind-icon">clone</a>
 				</li>
@@ -1249,6 +1252,7 @@ <h3>Methods</h3>
 							<li class="tsd-kind-method tsd-parent-kind-class"><a href="multigraphadapter.html#canaddedge" class="tsd-kind-icon">can<wbr>Add<wbr>Edge</a></li>
 							<li class="tsd-kind-method tsd-parent-kind-class"><a href="multigraphadapter.html#cancontractedge" class="tsd-kind-icon">can<wbr>Contract<wbr>Edge</a></li>
 							<li class="tsd-kind-method tsd-parent-kind-class"><a href="multigraphadapter.html#cancontractlabelededge" class="tsd-kind-icon">can<wbr>Contract<wbr>Labeled<wbr>Edge</a></li>
+							<li class="tsd-kind-method tsd-parent-kind-class"><a href="multigraphadapter.html#cancontractoneedge" class="tsd-kind-icon">can<wbr>Contract<wbr>One<wbr>Edge</a></li>
 							<li class="tsd-kind-method tsd-parent-kind-class"><a href="multigraphadapter.html#clone" class="tsd-kind-icon">clone</a></li>
 							<li class="tsd-kind-method tsd-parent-kind-class"><a href="multigraphadapter.html#contractedge" class="tsd-kind-icon">contract<wbr>Edge</a></li>
 							<li class="tsd-kind-method tsd-parent-kind-class"><a href="multigraphadapter.html#contractlabelededge" class="tsd-kind-icon">contract<wbr>Labeled<wbr>Edge</a></li>
@@ -1299,7 +1303,7 @@ <h3>add<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L173">MultiGraphAdapter.ts:173</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L173">MultiGraphAdapter.ts:173</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1341,7 +1345,7 @@ <h3>add<wbr>Labeled<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L154">MultiGraphAdapter.ts:154</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L154">MultiGraphAdapter.ts:154</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1385,7 +1389,7 @@ <h3>add<wbr>Vertex</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#addvertex">addVertex</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L192">MultiGraphAdapter.ts:192</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L192">MultiGraphAdapter.ts:192</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1408,7 +1412,7 @@ <h3>can<wbr>Add<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L158">MultiGraphAdapter.ts:158</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L158">MultiGraphAdapter.ts:158</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1438,7 +1442,7 @@ <h3>can<wbr>Contract<wbr>Edge</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#cancontractedge">canContractEdge</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L325">MultiGraphAdapter.ts:325</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L345">MultiGraphAdapter.ts:345</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1464,7 +1468,7 @@ <h3>can<wbr>Contract<wbr>Labeled<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L318">MultiGraphAdapter.ts:318</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L320">MultiGraphAdapter.ts:320</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1500,6 +1504,46 @@ <h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">boolean</
 					</li>
 				</ul>
 			</section>
+			<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class">
+				<a name="cancontractoneedge" class="tsd-anchor"></a>
+				<h3>can<wbr>Contract<wbr>One<wbr>Edge</h3>
+				<ul class="tsd-signatures tsd-kind-method tsd-parent-kind-class">
+					<li class="tsd-signature tsd-kind-icon">can<wbr>Contract<wbr>One<wbr>Edge<span class="tsd-signature-symbol">(</span>from<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">TVertex</span>, to<span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">)</span><span class="tsd-signature-symbol">: </span><span class="tsd-signature-type">boolean</span></li>
+				</ul>
+				<ul class="tsd-descriptions">
+					<li class="tsd-description">
+						<aside class="tsd-sources">
+							<ul>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L338">MultiGraphAdapter.ts:338</a></li>
+							</ul>
+						</aside>
+						<div class="tsd-comment tsd-typography">
+							<div class="lead">
+								<p>This check if a single labeled edge between the given vertices can be contracted. Note that cycles are not
+									allowed, so if there exists more than one edge between the given vertices, the contraction cannot be
+								performed as that would create a cycle.</p>
+							</div>
+						</div>
+						<h4 class="tsd-parameters-title">Parameters</h4>
+						<ul class="tsd-parameters">
+							<li>
+								<h5>from: <span class="tsd-signature-type">TVertex</span></h5>
+								<div class="tsd-comment tsd-typography">
+									<p>Source vertex of the edge.</p>
+								</div>
+							</li>
+							<li>
+								<h5>to: <span class="tsd-signature-type">TVertex</span></h5>
+								<div class="tsd-comment tsd-typography">
+									<p>Target vertex of the edge.</p>
+								</div>
+							</li>
+						</ul>
+						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">boolean</span></h4>
+						<p><code>true</code> iff the edge can be contracted, <code>false</code> otherwise.</p>
+					</li>
+				</ul>
+			</section>
 			<section class="tsd-panel tsd-member tsd-kind-method tsd-parent-kind-class">
 				<a name="clone" class="tsd-anchor"></a>
 				<h3>clone</h3>
@@ -1510,7 +1554,7 @@ <h3>clone</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L142">MultiGraphAdapter.ts:142</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L142">MultiGraphAdapter.ts:142</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1540,7 +1584,7 @@ <h3>contract<wbr>Edge</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#contractedge">contractEdge</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L267">MultiGraphAdapter.ts:267</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L267">MultiGraphAdapter.ts:267</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1582,7 +1626,7 @@ <h3>contract<wbr>Labeled<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L299">MultiGraphAdapter.ts:299</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L299">MultiGraphAdapter.ts:299</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1645,7 +1689,7 @@ <h3>delete<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L357">MultiGraphAdapter.ts:357</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L377">MultiGraphAdapter.ts:377</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1684,7 +1728,7 @@ <h3>delete<wbr>Labeled<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L336">MultiGraphAdapter.ts:336</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L356">MultiGraphAdapter.ts:356</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1729,7 +1773,7 @@ <h3>delete<wbr>Vertex</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#deletevertex">deleteVertex</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L370">MultiGraphAdapter.ts:370</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L390">MultiGraphAdapter.ts:390</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1762,7 +1806,7 @@ <h3>get<wbr>Edge<wbr>Count</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getedgecount">getEdgeCount</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L396">MultiGraphAdapter.ts:396</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L416">MultiGraphAdapter.ts:416</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1788,7 +1832,7 @@ <h3>get<wbr>Edge<wbr>Count<wbr>Between</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L453">MultiGraphAdapter.ts:453</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L473">MultiGraphAdapter.ts:473</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1823,7 +1867,7 @@ <h3>get<wbr>Edge<wbr>Data</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L404">MultiGraphAdapter.ts:404</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L424">MultiGraphAdapter.ts:424</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1865,7 +1909,7 @@ <h3>get<wbr>Edge<wbr>Data<wbr>From</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L249">MultiGraphAdapter.ts:249</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L249">MultiGraphAdapter.ts:249</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1901,7 +1945,7 @@ <h3>get<wbr>Edge<wbr>Data<wbr>To</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L234">MultiGraphAdapter.ts:234</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L234">MultiGraphAdapter.ts:234</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1937,7 +1981,7 @@ <h3>get<wbr>Edge<wbr>Labels</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L461">MultiGraphAdapter.ts:461</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L481">MultiGraphAdapter.ts:481</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1964,7 +2008,7 @@ <h3>get<wbr>Edges</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getedges">getEdges</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L425">MultiGraphAdapter.ts:425</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L445">MultiGraphAdapter.ts:445</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Iterator</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">Pair</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">&gt;</span></h4>
@@ -1982,7 +2026,7 @@ <h3>get<wbr>Edges<wbr>With<wbr>Data</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getedgeswithdata">getEdgesWithData</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L429">MultiGraphAdapter.ts:429</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L449">MultiGraphAdapter.ts:449</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Iterator</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">Triple</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">Maybe</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TEdgeData</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">&gt;</span></h4>
@@ -1999,7 +2043,7 @@ <h3>get<wbr>Edges<wbr>With<wbr>Data<wbr>From</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L217">MultiGraphAdapter.ts:217</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L217">MultiGraphAdapter.ts:217</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -2035,7 +2079,7 @@ <h3>get<wbr>Edges<wbr>With<wbr>Data<wbr>To</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L200">MultiGraphAdapter.ts:200</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L200">MultiGraphAdapter.ts:200</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -2071,7 +2115,7 @@ <h3>get<wbr>Labeled<wbr>Edge<wbr>Count</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L387">MultiGraphAdapter.ts:387</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L407">MultiGraphAdapter.ts:407</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -2095,7 +2139,7 @@ <h3>get<wbr>Labeled<wbr>Edges</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L475">MultiGraphAdapter.ts:475</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L495">MultiGraphAdapter.ts:495</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -2120,7 +2164,7 @@ <h3>get<wbr>Labeled<wbr>Edges<wbr>With<wbr>Data</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L438">MultiGraphAdapter.ts:438</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L458">MultiGraphAdapter.ts:458</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Iterator</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">Quadruple</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">Maybe</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TEdgeData</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">Maybe</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TEdgeLabel</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">&gt;</span></h4>
@@ -2138,7 +2182,7 @@ <h3>get<wbr>Order</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getorder">getOrder</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L516">MultiGraphAdapter.ts:516</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L536">MultiGraphAdapter.ts:536</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -2161,7 +2205,7 @@ <h3>get<wbr>Predecessors<wbr>Of</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L491">MultiGraphAdapter.ts:491</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L511">MultiGraphAdapter.ts:511</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -2198,7 +2242,7 @@ <h3>get<wbr>Successors<wbr>Of</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L506">MultiGraphAdapter.ts:506</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L526">MultiGraphAdapter.ts:526</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -2236,7 +2280,7 @@ <h3>get<wbr>Vertex<wbr>Count</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getvertexcount">getVertexCount</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L524">MultiGraphAdapter.ts:524</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L544">MultiGraphAdapter.ts:544</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">number</span></h4>
@@ -2254,7 +2298,7 @@ <h3>get<wbr>Vertices</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#getvertices">getVertices</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L528">MultiGraphAdapter.ts:528</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L548">MultiGraphAdapter.ts:548</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Iterator</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">&gt;</span></h4>
@@ -2271,7 +2315,7 @@ <h3>has<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L538">MultiGraphAdapter.ts:538</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L558">MultiGraphAdapter.ts:558</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -2312,7 +2356,7 @@ <h3>has<wbr>Labeled<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L552">MultiGraphAdapter.ts:552</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L572">MultiGraphAdapter.ts:572</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -2358,7 +2402,7 @@ <h3>has<wbr>Vertex</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#hasvertex">hasVertex</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L558">MultiGraphAdapter.ts:558</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L578">MultiGraphAdapter.ts:578</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -2382,7 +2426,7 @@ <h3>is<wbr>Reachable</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#isreachable">isReachable</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L562">MultiGraphAdapter.ts:562</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L582">MultiGraphAdapter.ts:582</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -2409,7 +2453,7 @@ <h3>map</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/clonableadapter.html">ClonableAdapter</a>.<a href="../interfaces/clonableadapter.html#map">map</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L138">MultiGraphAdapter.ts:138</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L138">MultiGraphAdapter.ts:138</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-type-parameters-title">Type parameters</h4>
@@ -2444,7 +2488,7 @@ <h3>map<wbr>Labeled</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L124">MultiGraphAdapter.ts:124</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L124">MultiGraphAdapter.ts:124</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -2512,7 +2556,7 @@ <h3>set<wbr>Edge<wbr>Data</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L416">MultiGraphAdapter.ts:416</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L436">MultiGraphAdapter.ts:436</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -2555,7 +2599,7 @@ <h3>supports<wbr>Order</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/commonadapter.html">CommonAdapter</a>.<a href="../interfaces/commonadapter.html#supportsorder">supportsOrder</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L520">MultiGraphAdapter.ts:520</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L540">MultiGraphAdapter.ts:540</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">boolean</span></h4>
@@ -2572,7 +2616,7 @@ <h3><span class="tsd-flag ts-flagStatic">Static</span> create</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/MultiGraphAdapter.ts#L94">MultiGraphAdapter.ts:94</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/MultiGraphAdapter.ts#L94">MultiGraphAdapter.ts:94</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
diff --git a/docs/classes/pearcekellydetector.html b/docs/classes/pearcekellydetector.html
index 69f287a..2e8398e 100644
--- a/docs/classes/pearcekellydetector.html
+++ b/docs/classes/pearcekellydetector.html
@@ -1120,7 +1120,7 @@ <h3>constructor</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/PearceKellyDetector.ts#L68">PearceKellyDetector.ts:68</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/PearceKellyDetector.ts#L68">PearceKellyDetector.ts:68</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <a href="pearcekellydetector.html" class="tsd-signature-type">PearceKellyDetector</a></h4>
@@ -1141,7 +1141,7 @@ <h3>can<wbr>Add<wbr>Edge</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/cycledetector.html">CycleDetector</a>.<a href="../interfaces/cycledetector.html#canaddedge">canAddEdge</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/PearceKellyDetector.ts#L122">PearceKellyDetector.ts:122</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/PearceKellyDetector.ts#L122">PearceKellyDetector.ts:122</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1171,7 +1171,7 @@ <h3>create<wbr>Vertex<wbr>Data</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/cycledetector.html">CycleDetector</a>.<a href="../interfaces/cycledetector.html#createvertexdata">createVertexData</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/PearceKellyDetector.ts#L108">PearceKellyDetector.ts:108</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/PearceKellyDetector.ts#L108">PearceKellyDetector.ts:108</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1195,7 +1195,7 @@ <h3>get<wbr>Order</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/cycledetector.html">CycleDetector</a>.<a href="../interfaces/cycledetector.html#getorder">getOrder</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/PearceKellyDetector.ts#L134">PearceKellyDetector.ts:134</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/PearceKellyDetector.ts#L134">PearceKellyDetector.ts:134</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1222,7 +1222,7 @@ <h3>is<wbr>Reachable</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/cycledetector.html">CycleDetector</a>.<a href="../interfaces/cycledetector.html#isreachable">isReachable</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/PearceKellyDetector.ts#L89">PearceKellyDetector.ts:89</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/PearceKellyDetector.ts#L89">PearceKellyDetector.ts:89</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1252,7 +1252,7 @@ <h3>map</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/cycledetector.html">CycleDetector</a>.<a href="../interfaces/cycledetector.html#map">map</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/PearceKellyDetector.ts#L78">PearceKellyDetector.ts:78</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/PearceKellyDetector.ts#L78">PearceKellyDetector.ts:78</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-type-parameters-title">Type parameters</h4>
@@ -1276,7 +1276,7 @@ <h3>on<wbr>Vertex<wbr>Deletion</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/cycledetector.html">CycleDetector</a>.<a href="../interfaces/cycledetector.html#onvertexdeletion">onVertexDeletion</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/PearceKellyDetector.ts#L116">PearceKellyDetector.ts:116</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/PearceKellyDetector.ts#L116">PearceKellyDetector.ts:116</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-parameters-title">Parameters</h4>
@@ -1303,7 +1303,7 @@ <h3>supports<wbr>Order</h3>
 						<aside class="tsd-sources">
 							<p>Implementation of <a href="../interfaces/cycledetector.html">CycleDetector</a>.<a href="../interfaces/cycledetector.html#supportsorder">supportsOrder</a></p>
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/PearceKellyDetector.ts#L130">PearceKellyDetector.ts:130</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/PearceKellyDetector.ts#L130">PearceKellyDetector.ts:130</a></li>
 							</ul>
 						</aside>
 						<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">boolean</span></h4>
diff --git a/docs/globals.html b/docs/globals.html
index 7ede912..b530452 100644
--- a/docs/globals.html
+++ b/docs/globals.html
@@ -1230,7 +1230,7 @@ <h3>Graph<wbr>Factory</h3>
 				<div class="tsd-signature tsd-kind-icon">Graph<wbr>Factory<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">function</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L39">Header.ts:39</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L39">Header.ts:39</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
@@ -1265,7 +1265,7 @@ <h3>Graphlib<wbr>Constructor</h3>
 				<div class="tsd-signature tsd-kind-icon">Graphlib<wbr>Constructor<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">object</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L54">Header.ts:54</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L54">Header.ts:54</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-type-declaration">
@@ -1280,7 +1280,7 @@ <h3>Label<wbr>Generator</h3>
 				<div class="tsd-signature tsd-kind-icon">Label<wbr>Generator<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">TypedTriFunction</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">TEdgeData</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">Maybe</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TEdgeLabel</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">&gt;</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L4">Header.ts:4</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L4">Header.ts:4</a></li>
 					</ul>
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@@ -1290,7 +1290,7 @@ <h3>Multi<wbr>Graph<wbr>Edge<wbr>Data</h3>
 				<div class="tsd-signature tsd-kind-icon">Multi<wbr>Graph<wbr>Edge<wbr>Data<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">Map</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">Maybe</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TEdgeLabel</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">Maybe</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TEdgeData</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">&gt;</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L36">Header.ts:36</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L36">Header.ts:36</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
@@ -1310,7 +1310,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> <span class="tsd-flag t
 				<div class="tsd-signature tsd-kind-icon">Dummy<wbr>Detector<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">(Anonymous class)</span><span class="tsd-signature-symbol"> =&nbsp;new class implements CycleDetector&lt;any&gt; {map&lt;TAnotherClonedVertex&gt;(): CycleDetector&lt;TAnotherClonedVertex&gt; {return DummyDetector;}createVertexData(g: GraphAdapter&lt;any&gt;): VertexData {return DummyVertexData;}canAddEdge(g: GraphAdapter&lt;any&gt;, from: any, to: any): boolean {return true;}isReachable(g: GraphAdapter&lt;any&gt;, source: any, target: any): boolean {return false;}onVertexDeletion(g: GraphAdapter&lt;any&gt;, vertex: any): void {/***/}supportsOrder(): boolean {return false;}// and target, merging both vertices results in a cycle.getOrder(g: GraphAdapter&lt;any&gt;, vertex: any): number {return -1;}}()</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L391">util.ts:391</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L391">util.ts:391</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
@@ -1333,7 +1333,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> assign</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L45">util.ts:45</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L45">util.ts:45</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
@@ -1377,7 +1377,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> can<wbr>Contract<wbr>Ed
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L243">util.ts:243</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L243">util.ts:243</a></li>
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 						<div class="tsd-comment tsd-typography">
@@ -1421,7 +1421,7 @@ <h3>combine<wbr>Iterators</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L74">util.ts:74</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L74">util.ts:74</a></li>
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 						<h4 class="tsd-type-parameters-title">Type parameters</h4>
@@ -1450,7 +1450,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> contract<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L267">util.ts:267</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L267">util.ts:267</a></li>
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 						<div class="tsd-comment tsd-typography">
@@ -1500,7 +1500,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> create<wbr>Array<wbr>It
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L198">util.ts:198</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L198">util.ts:198</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1538,7 +1538,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> create<wbr>Chained<wbr>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L141">util.ts:141</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L141">util.ts:141</a></li>
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 						<div class="tsd-comment tsd-typography">
@@ -1574,7 +1574,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> create<wbr>Filtered<wbr
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L123">util.ts:123</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L123">util.ts:123</a></li>
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 						<div class="tsd-comment tsd-typography">
@@ -1600,7 +1600,7 @@ <h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Iterator<
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L124">util.ts:124</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L124">util.ts:124</a></li>
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 						<h4 class="tsd-type-parameters-title">Type parameters</h4>
@@ -1632,7 +1632,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> create<wbr>Flat<wbr>Map
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 						<aside class="tsd-sources">
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L171">util.ts:171</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L171">util.ts:171</a></li>
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@@ -1683,7 +1683,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> create<wbr>Mapped<wbr>A
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L221">util.ts:221</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L221">util.ts:221</a></li>
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@@ -1724,7 +1724,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> create<wbr>Mapped<wbr>I
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L104">util.ts:104</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L104">util.ts:104</a></li>
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 						<div class="tsd-comment tsd-typography">
@@ -1765,7 +1765,7 @@ <h3>for<wbr>Each</h3>
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 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L66">util.ts:66</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L66">util.ts:66</a></li>
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 						<h4 class="tsd-type-parameters-title">Type parameters</h4>
@@ -1797,7 +1797,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> take<wbr>First</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L12">util.ts:12</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L12">util.ts:12</a></li>
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 						<div class="tsd-comment tsd-typography">
@@ -1835,7 +1835,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> to<wbr>Array</h3>
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 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L58">util.ts:58</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L58">util.ts:58</a></li>
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 						<div class="tsd-comment tsd-typography">
@@ -1869,7 +1869,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> <span class="tsd-flag t
 				<div class="tsd-signature tsd-kind-icon">Done<wbr>Iterator<wbr>Result<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">object</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L20">util.ts:20</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L20">util.ts:20</a></li>
 					</ul>
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 				<div class="tsd-comment tsd-typography">
@@ -1884,7 +1884,7 @@ <h3>done</h3>
 					<div class="tsd-signature tsd-kind-icon">done<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">true</span><span class="tsd-signature-symbol"> =&nbsp;true</span></div>
 					<aside class="tsd-sources">
 						<ul>
-							<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L21">util.ts:21</a></li>
+							<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L21">util.ts:21</a></li>
 						</ul>
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@@ -1894,7 +1894,7 @@ <h3>value</h3>
 					<div class="tsd-signature tsd-kind-icon">value<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">undefined</span><span class="tsd-signature-symbol"> =&nbsp;undefined</span></div>
 					<aside class="tsd-sources">
 						<ul>
-							<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L22">util.ts:22</a></li>
+							<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L22">util.ts:22</a></li>
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@@ -1905,7 +1905,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> <span class="tsd-flag t
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 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L29">util.ts:29</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L29">util.ts:29</a></li>
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@@ -1924,7 +1924,7 @@ <h3>next</h3>
 						<li class="tsd-description">
 							<aside class="tsd-sources">
 								<ul>
-									<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L30">util.ts:30</a></li>
+									<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L30">util.ts:30</a></li>
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 							<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">IteratorResult</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">&gt;</span></h4>
diff --git a/docs/index.html b/docs/index.html
index 60f57ca..1a394c6 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -1231,7 +1231,7 @@ <h3>Graph<wbr>Factory</h3>
 				<div class="tsd-signature tsd-kind-icon">Graph<wbr>Factory<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">function</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L39">Header.ts:39</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L39">Header.ts:39</a></li>
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 				<div class="tsd-comment tsd-typography">
@@ -1266,7 +1266,7 @@ <h3>Graphlib<wbr>Constructor</h3>
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 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L54">Header.ts:54</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L54">Header.ts:54</a></li>
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@@ -1281,7 +1281,7 @@ <h3>Label<wbr>Generator</h3>
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 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L4">Header.ts:4</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L4">Header.ts:4</a></li>
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@@ -1291,7 +1291,7 @@ <h3>Multi<wbr>Graph<wbr>Edge<wbr>Data</h3>
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 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L36">Header.ts:36</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L36">Header.ts:36</a></li>
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 				<div class="tsd-comment tsd-typography">
@@ -1311,7 +1311,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> <span class="tsd-flag t
 				<div class="tsd-signature tsd-kind-icon">Dummy<wbr>Detector<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">(Anonymous class)</span><span class="tsd-signature-symbol"> =&nbsp;new class implements CycleDetector&lt;any&gt; {map&lt;TAnotherClonedVertex&gt;(): CycleDetector&lt;TAnotherClonedVertex&gt; {return DummyDetector;}createVertexData(g: GraphAdapter&lt;any&gt;): VertexData {return DummyVertexData;}canAddEdge(g: GraphAdapter&lt;any&gt;, from: any, to: any): boolean {return true;}isReachable(g: GraphAdapter&lt;any&gt;, source: any, target: any): boolean {return false;}onVertexDeletion(g: GraphAdapter&lt;any&gt;, vertex: any): void {/***/}supportsOrder(): boolean {return false;}// and target, merging both vertices results in a cycle.getOrder(g: GraphAdapter&lt;any&gt;, vertex: any): number {return -1;}}()</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L391">util.ts:391</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L391">util.ts:391</a></li>
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@@ -1334,7 +1334,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> assign</h3>
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L45">util.ts:45</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L45">util.ts:45</a></li>
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@@ -1378,7 +1378,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> can<wbr>Contract<wbr>Ed
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 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L243">util.ts:243</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L243">util.ts:243</a></li>
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 						<div class="tsd-comment tsd-typography">
@@ -1422,7 +1422,7 @@ <h3>combine<wbr>Iterators</h3>
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L74">util.ts:74</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L74">util.ts:74</a></li>
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 						<h4 class="tsd-type-parameters-title">Type parameters</h4>
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L267">util.ts:267</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L267">util.ts:267</a></li>
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@@ -1501,7 +1501,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> create<wbr>Array<wbr>It
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L198">util.ts:198</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L198">util.ts:198</a></li>
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@@ -1539,7 +1539,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> create<wbr>Chained<wbr>
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L141">util.ts:141</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L141">util.ts:141</a></li>
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@@ -1575,7 +1575,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> create<wbr>Filtered<wbr
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L123">util.ts:123</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L123">util.ts:123</a></li>
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@@ -1601,7 +1601,7 @@ <h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">Iterator<
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L124">util.ts:124</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L124">util.ts:124</a></li>
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@@ -1633,7 +1633,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> create<wbr>Flat<wbr>Map
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L171">util.ts:171</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L171">util.ts:171</a></li>
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@@ -1684,7 +1684,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> create<wbr>Mapped<wbr>A
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L221">util.ts:221</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L221">util.ts:221</a></li>
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L104">util.ts:104</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L104">util.ts:104</a></li>
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@@ -1766,7 +1766,7 @@ <h3>for<wbr>Each</h3>
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L66">util.ts:66</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L66">util.ts:66</a></li>
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L12">util.ts:12</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L12">util.ts:12</a></li>
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-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L58">util.ts:58</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L58">util.ts:58</a></li>
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@@ -1870,7 +1870,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> <span class="tsd-flag t
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-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L20">util.ts:20</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L20">util.ts:20</a></li>
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 				<div class="tsd-comment tsd-typography">
@@ -1885,7 +1885,7 @@ <h3>done</h3>
 					<div class="tsd-signature tsd-kind-icon">done<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">true</span><span class="tsd-signature-symbol"> =&nbsp;true</span></div>
 					<aside class="tsd-sources">
 						<ul>
-							<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L21">util.ts:21</a></li>
+							<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L21">util.ts:21</a></li>
 						</ul>
 					</aside>
 				</section>
@@ -1895,7 +1895,7 @@ <h3>value</h3>
 					<div class="tsd-signature tsd-kind-icon">value<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">undefined</span><span class="tsd-signature-symbol"> =&nbsp;undefined</span></div>
 					<aside class="tsd-sources">
 						<ul>
-							<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L22">util.ts:22</a></li>
+							<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L22">util.ts:22</a></li>
 						</ul>
 					</aside>
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@@ -1906,7 +1906,7 @@ <h3><span class="tsd-flag ts-flagPrivate">Private</span> <span class="tsd-flag t
 				<div class="tsd-signature tsd-kind-icon">Empty<wbr>Iterator<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">object</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L29">util.ts:29</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L29">util.ts:29</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
@@ -1925,7 +1925,7 @@ <h3>next</h3>
 						<li class="tsd-description">
 							<aside class="tsd-sources">
 								<ul>
-									<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/util.ts#L30">util.ts:30</a></li>
+									<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/util.ts#L30">util.ts:30</a></li>
 								</ul>
 							</aside>
 							<h4 class="tsd-returns-title">Returns <span class="tsd-signature-type">IteratorResult</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">any</span><span class="tsd-signature-symbol">&gt;</span></h4>
diff --git a/docs/interfaces/clonableadapter.html b/docs/interfaces/clonableadapter.html
index 5eda468..4afe445 100644
--- a/docs/interfaces/clonableadapter.html
+++ b/docs/interfaces/clonableadapter.html
@@ -1076,7 +1076,7 @@ <h3>clone</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L177">Header.ts:177</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L177">Header.ts:177</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1123,7 +1123,7 @@ <h3>map</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L195">Header.ts:195</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L195">Header.ts:195</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
diff --git a/docs/interfaces/commonadapter.html b/docs/interfaces/commonadapter.html
index 20ec62b..5df7f11 100644
--- a/docs/interfaces/commonadapter.html
+++ b/docs/interfaces/commonadapter.html
@@ -1176,7 +1176,7 @@ <h3>add<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L207">Header.ts:207</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L207">Header.ts:207</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1218,7 +1218,7 @@ <h3>add<wbr>Vertex</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L213">Header.ts:213</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L213">Header.ts:213</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1250,7 +1250,7 @@ <h3>can<wbr>Add<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L220">Header.ts:220</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L220">Header.ts:220</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1288,7 +1288,7 @@ <h3>can<wbr>Contract<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L227">Header.ts:227</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L227">Header.ts:227</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1326,7 +1326,7 @@ <h3>contract<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L241">Header.ts:241</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L241">Header.ts:241</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1385,7 +1385,7 @@ <h3>delete<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L248">Header.ts:248</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L248">Header.ts:248</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1423,7 +1423,7 @@ <h3>delete<wbr>Vertex</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L254">Header.ts:254</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L254">Header.ts:254</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1455,7 +1455,7 @@ <h3>get<wbr>Edge<wbr>Count</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L258">Header.ts:258</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L258">Header.ts:258</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1475,7 +1475,7 @@ <h3>get<wbr>Edge<wbr>Data</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L264">Header.ts:264</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L264">Header.ts:264</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
@@ -1510,7 +1510,7 @@ <h3>get<wbr>Edge<wbr>Data<wbr>From</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L278">Header.ts:278</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L278">Header.ts:278</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1543,7 +1543,7 @@ <h3>get<wbr>Edge<wbr>Data<wbr>To</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L271">Header.ts:271</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L271">Header.ts:271</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1576,7 +1576,7 @@ <h3>get<wbr>Edges</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L296">Header.ts:296</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L296">Header.ts:296</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
@@ -1596,7 +1596,7 @@ <h3>get<wbr>Edges<wbr>With<wbr>Data</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L300">Header.ts:300</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L300">Header.ts:300</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
@@ -1616,7 +1616,7 @@ <h3>get<wbr>Edges<wbr>With<wbr>Data<wbr>From</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L292">Header.ts:292</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L292">Header.ts:292</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
@@ -1649,7 +1649,7 @@ <h3>get<wbr>Edges<wbr>With<wbr>Data<wbr>To</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L285">Header.ts:285</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L285">Header.ts:285</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
@@ -1682,7 +1682,7 @@ <h3>get<wbr>Order</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L307">Header.ts:307</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L307">Header.ts:307</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
@@ -1714,7 +1714,7 @@ <h3>get<wbr>Predecessors<wbr>Of</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L312">Header.ts:312</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L312">Header.ts:312</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
@@ -1743,7 +1743,7 @@ <h3>get<wbr>Successors<wbr>Of</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L317">Header.ts:317</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L317">Header.ts:317</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
@@ -1772,7 +1772,7 @@ <h3>get<wbr>Vertex<wbr>Count</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L321">Header.ts:321</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L321">Header.ts:321</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
@@ -1792,7 +1792,7 @@ <h3>get<wbr>Vertices</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L325">Header.ts:325</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L325">Header.ts:325</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
@@ -1812,7 +1812,7 @@ <h3>has<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L331">Header.ts:331</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L331">Header.ts:331</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1847,7 +1847,7 @@ <h3>has<wbr>Vertex</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L336">Header.ts:336</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L336">Header.ts:336</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
@@ -1873,7 +1873,7 @@ <h3>is<wbr>Reachable</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L343">Header.ts:343</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L343">Header.ts:343</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
@@ -1911,7 +1911,7 @@ <h3>set<wbr>Edge<wbr>Data</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L350">Header.ts:350</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L350">Header.ts:350</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
@@ -1952,7 +1952,7 @@ <h3>supports<wbr>Order</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L354">Header.ts:354</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L354">Header.ts:354</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
diff --git a/docs/interfaces/cycledetector.html b/docs/interfaces/cycledetector.html
index 1f95a70..39eb44d 100644
--- a/docs/interfaces/cycledetector.html
+++ b/docs/interfaces/cycledetector.html
@@ -1102,7 +1102,7 @@ <h3>can<wbr>Add<wbr>Edge</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L110">Header.ts:110</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L110">Header.ts:110</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
@@ -1148,7 +1148,7 @@ <h3>create<wbr>Vertex<wbr>Data</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L119">Header.ts:119</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L119">Header.ts:119</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
@@ -1182,7 +1182,7 @@ <h3>get<wbr>Order</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L127">Header.ts:127</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L127">Header.ts:127</a></li>
 							</ul>
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 						<div class="tsd-comment tsd-typography">
@@ -1220,7 +1220,7 @@ <h3>is<wbr>Reachable</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L137">Header.ts:137</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L137">Header.ts:137</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1265,7 +1265,7 @@ <h3>map</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L145">Header.ts:145</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L145">Header.ts:145</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1296,7 +1296,7 @@ <h3>on<wbr>Vertex<wbr>Deletion</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L153">Header.ts:153</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L153">Header.ts:153</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1334,7 +1334,7 @@ <h3>supports<wbr>Order</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L158">Header.ts:158</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L158">Header.ts:158</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
diff --git a/docs/interfaces/genericgraphadapteroptions.html b/docs/interfaces/genericgraphadapteroptions.html
index a715e54..26a50b5 100644
--- a/docs/interfaces/genericgraphadapteroptions.html
+++ b/docs/interfaces/genericgraphadapteroptions.html
@@ -1069,7 +1069,7 @@ <h3>cycle<wbr>Detector</h3>
 				<div class="tsd-signature tsd-kind-icon">cycle<wbr>Detector<span class="tsd-signature-symbol">:</span> <a href="cycledetector.html" class="tsd-signature-type">CycleDetector</a><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">&gt;</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L20">Header.ts:20</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L20">Header.ts:20</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
@@ -1084,7 +1084,7 @@ <h3>map<wbr>Constructor</h3>
 				<div class="tsd-signature tsd-kind-icon">map<wbr>Constructor<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">MapConstructor</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L32">Header.ts:32</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L32">Header.ts:32</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
diff --git a/docs/interfaces/graphadapter.html b/docs/interfaces/graphadapter.html
index 5e1eeb7..ba5da68 100644
--- a/docs/interfaces/graphadapter.html
+++ b/docs/interfaces/graphadapter.html
@@ -1079,7 +1079,7 @@ <h3>get<wbr>Data</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L91">Header.ts:91</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L91">Header.ts:91</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1105,7 +1105,7 @@ <h3>get<wbr>Predecessors<wbr>Of</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L85">Header.ts:85</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L85">Header.ts:85</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
@@ -1134,7 +1134,7 @@ <h3>get<wbr>Successors<wbr>Of</h3>
 					<li class="tsd-description">
 						<aside class="tsd-sources">
 							<ul>
-								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L79">Header.ts:79</a></li>
+								<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L79">Header.ts:79</a></li>
 							</ul>
 						</aside>
 						<div class="tsd-comment tsd-typography">
diff --git a/docs/interfaces/graphlibadapteroptions.html b/docs/interfaces/graphlibadapteroptions.html
index 20a0a0f..f6aba8e 100644
--- a/docs/interfaces/graphlibadapteroptions.html
+++ b/docs/interfaces/graphlibadapteroptions.html
@@ -1073,7 +1073,7 @@ <h3>cycle<wbr>Detector</h3>
 				<div class="tsd-signature tsd-kind-icon">cycle<wbr>Detector<span class="tsd-signature-symbol">:</span> <a href="cycledetector.html" class="tsd-signature-type">CycleDetector</a><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">&gt;</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L59">Header.ts:59</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L59">Header.ts:59</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
@@ -1088,7 +1088,7 @@ <h3>graph<wbr>Options</h3>
 				<div class="tsd-signature tsd-kind-icon">graph<wbr>Options<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">Partial</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">Omit</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">GraphOptions</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">"directed"</span><span class="tsd-signature-symbol"> | </span><span class="tsd-signature-type">"multigraph"</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">&gt;</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L66">Header.ts:66</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L66">Header.ts:66</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
@@ -1103,7 +1103,7 @@ <h3>graphlib</h3>
 				<div class="tsd-signature tsd-kind-icon">graphlib<span class="tsd-signature-symbol">:</span> <a href="../globals.html#graphlibconstructor" class="tsd-signature-type">GraphlibConstructor</a></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L64">Header.ts:64</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L64">Header.ts:64</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
diff --git a/docs/interfaces/graphlibvertexdata.html b/docs/interfaces/graphlibvertexdata.html
index 40d8174..ed3aee0 100644
--- a/docs/interfaces/graphlibvertexdata.html
+++ b/docs/interfaces/graphlibvertexdata.html
@@ -1063,7 +1063,7 @@ <h3>gid</h3>
 				<div class="tsd-signature tsd-kind-icon">gid<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">string</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L51">Header.ts:51</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L51">Header.ts:51</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
@@ -1079,7 +1079,7 @@ <h3>order</h3>
 				<aside class="tsd-sources">
 					<p>Inherited from <a href="vertexdata.html">VertexData</a>.<a href="vertexdata.html#order">order</a></p>
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L12">Header.ts:12</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L12">Header.ts:12</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
@@ -1095,7 +1095,7 @@ <h3>visited</h3>
 				<aside class="tsd-sources">
 					<p>Inherited from <a href="vertexdata.html">VertexData</a>.<a href="vertexdata.html#visited">visited</a></p>
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L14">Header.ts:14</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L14">Header.ts:14</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
diff --git a/docs/interfaces/multigraphadapteroptions.html b/docs/interfaces/multigraphadapteroptions.html
index 76c5e2a..42595f6 100644
--- a/docs/interfaces/multigraphadapteroptions.html
+++ b/docs/interfaces/multigraphadapteroptions.html
@@ -1075,7 +1075,7 @@ <h3>graph<wbr>Factory</h3>
 				<div class="tsd-signature tsd-kind-icon">graph<wbr>Factory<span class="tsd-signature-symbol">:</span> <a href="../globals.html#graphfactory" class="tsd-signature-type">GraphFactory</a><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">TEdgeData</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">TEdgeLabel</span><span class="tsd-signature-symbol">&gt;</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L44">Header.ts:44</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L44">Header.ts:44</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
@@ -1090,7 +1090,7 @@ <h3>map<wbr>Constructor</h3>
 				<div class="tsd-signature tsd-kind-icon">map<wbr>Constructor<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">MapConstructor</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L46">Header.ts:46</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L46">Header.ts:46</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
diff --git a/docs/interfaces/vertexdata.html b/docs/interfaces/vertexdata.html
index 2c44764..f88b025 100644
--- a/docs/interfaces/vertexdata.html
+++ b/docs/interfaces/vertexdata.html
@@ -1070,7 +1070,7 @@ <h3>order</h3>
 				<div class="tsd-signature tsd-kind-icon">order<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">number</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L12">Header.ts:12</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L12">Header.ts:12</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
@@ -1085,7 +1085,7 @@ <h3>visited</h3>
 				<div class="tsd-signature tsd-kind-icon">visited<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">boolean</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L14">Header.ts:14</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L14">Header.ts:14</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
diff --git a/docs/interfaces/weaklyconnectedcomponent.html b/docs/interfaces/weaklyconnectedcomponent.html
index d707374..71f3250 100644
--- a/docs/interfaces/weaklyconnectedcomponent.html
+++ b/docs/interfaces/weaklyconnectedcomponent.html
@@ -1082,7 +1082,7 @@ <h3>edges</h3>
 				<div class="tsd-signature tsd-kind-icon">edges<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">Triple</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">, </span><span class="tsd-signature-type">Maybe</span><span class="tsd-signature-symbol">&lt;</span><span class="tsd-signature-type">TEdgeData</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">&gt;</span><span class="tsd-signature-symbol">[]</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L364">Header.ts:364</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L364">Header.ts:364</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
@@ -1097,7 +1097,7 @@ <h3>vertices</h3>
 				<div class="tsd-signature tsd-kind-icon">vertices<span class="tsd-signature-symbol">:</span> <span class="tsd-signature-type">TVertex</span><span class="tsd-signature-symbol">[]</span></div>
 				<aside class="tsd-sources">
 					<ul>
-						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/8fc44a3/src/Header.ts#L366">Header.ts:366</a></li>
+						<li>Defined in <a href="https://github.com/blutorange/js-incremental-cycle-detect/blob/566f08e/src/Header.ts#L366">Header.ts:366</a></li>
 					</ul>
 				</aside>
 				<div class="tsd-comment tsd-typography">
diff --git a/package-lock.json b/package-lock.json
index 09f0328..c568f1f 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -1,6 +1,6 @@
 {
   "name": "incremental-cycle-detect",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "lockfileVersion": 1,
   "requires": true,
   "dependencies": {
diff --git a/src/MultiGraphAdapter.ts b/src/MultiGraphAdapter.ts
index 48ffe55..7ce8449 100644
--- a/src/MultiGraphAdapter.ts
+++ b/src/MultiGraphAdapter.ts
@@ -298,8 +298,10 @@ export class MultiGraphAdapter<TVertex = any, TEdgeData = any, TEdgeLabel = any>
      */
     contractLabeledEdge(from: TVertex, to: TVertex, label?: TEdgeLabel, vertexMerger?: BinaryOperator<TVertex>, edgeMerger?: BinaryOperator<TEdgeData>): boolean {
         // Cannot contract edge if there is no edge or more than one edge between the given vertices.
-        const data = this.g.getEdgeData(from, to);
-        if (data === undefined || data.size !== 1) {
+        if (this.getEdgeCountBetween(from, to) !== 1) {
+            return false;
+        }
+        if (!this.hasLabeledEdge(from, to, label)) {
             return false;
         }
         // Only one edge betweem the given vertices, do a normal edge contraction.
@@ -316,7 +318,25 @@ export class MultiGraphAdapter<TVertex = any, TEdgeData = any, TEdgeLabel = any>
      * @return `true` iff the edge can be contracted, `false` otherwise.
      */
     canContractLabeledEdge(from: TVertex, to: TVertex, label?: TEdgeLabel): boolean {
-        if (label !== undefined && this.getEdgeCountBetween(from, to) !== 1) {
+        if (this.getEdgeCountBetween(from, to) !== 1) {
+            return false;
+        }
+        if (!this.hasLabeledEdge(from, to, label)) {
+            return false;
+        }
+        return this.canContractEdge(from, to);
+    }
+
+    /**
+     * This check if a single labeled edge between the given vertices can be contracted. Note that cycles are not
+     * allowed, so if there exists more than one edge between the given vertices, the contraction cannot be
+     * performed as that would create a cycle.
+     * @param from Source vertex of the edge.
+     * @param to Target vertex of the edge.
+     * @return `true` iff the edge can be contracted, `false` otherwise.
+     */
+    canContractOneEdge(from: TVertex, to: TVertex): boolean {
+        if (this.getEdgeCountBetween(from, to) !== 1) {
             return false;
         }
         return this.canContractEdge(from, to);
diff --git a/test/MultiGraphAdapterTest.ts b/test/MultiGraphAdapterTest.ts
index 080aaa8..6355f94 100644
--- a/test/MultiGraphAdapterTest.ts
+++ b/test/MultiGraphAdapterTest.ts
@@ -166,7 +166,7 @@ export class MultiAdapterTest {
         // With two vertices
         const g1 = this.make();
         g1.addEdge(1, 2, undefined, "foo");
-        expect(g1.canContractLabeledEdge(1 ,2)).to.be.true;
+        expect(g1.canContractLabeledEdge(1 ,2, "foo")).to.be.true;
         g1.addEdge(1, 2, undefined, "bar");
         expect(g1.getLabeledEdgeCount()).to.equal(2);
         expect(g1.canContractLabeledEdge(1 ,2, "foo")).to.be.false;