diff --git a/dokka-subprojects/plugin-base/src/main/kotlin/org/jetbrains/dokka/base/pages/AllTypesPageNode.kt b/dokka-subprojects/plugin-base/src/main/kotlin/org/jetbrains/dokka/base/pages/AllTypesPageNode.kt
index 8c46e3b92b..00fd342853 100644
--- a/dokka-subprojects/plugin-base/src/main/kotlin/org/jetbrains/dokka/base/pages/AllTypesPageNode.kt
+++ b/dokka-subprojects/plugin-base/src/main/kotlin/org/jetbrains/dokka/base/pages/AllTypesPageNode.kt
@@ -41,5 +41,6 @@ internal class AllTypesPageNode(
     }
 }
 
+// copy-pasted from dokka-core, not sure why it was needed in the first place
 private infix fun <T> List<T>.shallowEq(other: List<T>) =
     this === other || (this.size == other.size && (this zip other).all { (a, b) -> a === b })