diff --git a/dachlatten-primitives/src/main/kotlin/de/sipgate/dachlatten/primitives/CollectionExt.kt b/dachlatten-primitives/src/main/kotlin/de/sipgate/dachlatten/primitives/CollectionExt.kt
new file mode 100644
index 0000000..a12daae
--- /dev/null
+++ b/dachlatten-primitives/src/main/kotlin/de/sipgate/dachlatten/primitives/CollectionExt.kt
@@ -0,0 +1,7 @@
+package de.sipgate.dachlatten.primitives
+
+import de.sipgate.dachlatten.primitives.predicates.Predicate
+
+fun <T> Collection<T>.contains(predicate: Predicate<T>): Boolean {
+    return firstOrNull { predicate(it) } != null
+}
diff --git a/dachlatten-primitives/src/test/kotlin/de/sipgate/dachlatten/primitives/ComplexContainsTest.kt b/dachlatten-primitives/src/test/kotlin/de/sipgate/dachlatten/primitives/ComplexContainsTest.kt
new file mode 100644
index 0000000..f7df796
--- /dev/null
+++ b/dachlatten-primitives/src/test/kotlin/de/sipgate/dachlatten/primitives/ComplexContainsTest.kt
@@ -0,0 +1,45 @@
+package de.sipgate.dachlatten.primitives
+
+import de.sipgate.dachlatten.primitives.predicates.Predicate
+import de.sipgate.dachlatten.primitives.predicates.not
+import kotlinx.coroutines.test.runTest
+import kotlin.test.Test
+import kotlin.test.assertFalse
+import kotlin.test.assertTrue
+
+class ComplexContainsTest {
+
+    val list = listOf("a1entry", "b2entry", "otherEntry")
+
+    @Test
+    fun testSimpleContains() = runTest {
+        val result = list.contains<String> { it == "a1entry" }
+        assertTrue(result)
+    }
+
+    @Test
+    fun testSimpleContainsNegative() = runTest {
+        val result = list.contains<String> { it == "does-not-exist" }
+        assertFalse(result)
+    }
+
+    @Test
+    fun testComplexContains() = runTest {
+        val result = list.contains<String> { it.all { it.isLetter() } }
+        assertTrue(result)
+    }
+
+    @Test
+    fun testComplexContainsNegative() = runTest {
+        val result = list.contains<String> { it.all { it.isWhitespace() } }
+        assertFalse(result)
+    }
+
+    @Test
+    fun testComplexContainsInvert() = runTest {
+        val complexPredicate: Predicate<String> = { it.all { it.isWhitespace() } }
+        val invertedPredicate = !complexPredicate
+        val result = list.contains<String>(invertedPredicate)
+        assertTrue(result)
+    }
+}