diff --git a/src/Fabulous.Tests/APISketchTests/TestUI.Widgets.fs b/src/Fabulous.Tests/APISketchTests/TestUI.Widgets.fs
index daa31ebec..6dc1d10b2 100644
--- a/src/Fabulous.Tests/APISketchTests/TestUI.Widgets.fs
+++ b/src/Fabulous.Tests/APISketchTests/TestUI.Widgets.fs
@@ -167,16 +167,6 @@ module TestUI_Widgets =
             : Content<'msg> =
             CollectionBuilder.yieldImpl x
 
-        [<Extension>]
-        static member inline YieldFrom<'msg, 'marker, 'itemMarker when 'msg: equality and 'itemMarker :> IMarker>
-            (_: CollectionBuilder<'msg, 'marker, IMarker>, x: WidgetBuilder<'msg, 'itemMarker> seq)
-            : Content<'msg> =
-            // TODO optimize this one with addMut
-            { Widgets = x |> Seq.map(fun wb -> wb.Compile()) |> Seq.toArray |> MutStackArray1.fromArray }
-
-
-
-
     ///------------------
     type StatefulView<'arg, 'model, 'msg, 'marker when 'msg: equality> =
         { Init: 'arg -> 'model
diff --git a/src/Fabulous/Builders.fs b/src/Fabulous/Builders.fs
index e14a7da07..7a4e438d8 100644
--- a/src/Fabulous/Builders.fs
+++ b/src/Fabulous/Builders.fs
@@ -241,6 +241,14 @@ type CollectionBuilder<'msg, 'marker, 'itemMarker when 'msg: equality> =
 
             res
 
+        member inline _.YieldFrom(sequence: WidgetBuilder<'msg, 'itemMarker> seq) : Content<'msg> =
+            // TODO optimize this one with addMut
+            { Widgets =
+                sequence
+                |> Seq.map(fun wb -> wb.Compile())
+                |> Seq.toArray
+                |> MutStackArray1.fromArray }
+
         [<EditorBrowsable(EditorBrowsableState.Never)>]
         member inline x.AddScalar(attr: ScalarAttribute) =
             let struct (scalarAttributes, widgetAttributes, widgetCollectionAttributes, environmentAttributes) =