kotlin-stdlib/kotlin.collections/HashSet/retainAll

retainAll

expect open override fun retainAll(elements: Collection<E>): Boolean(source)

Retains only the elements in this collection that are contained in the specified collection.

Since Kotlin

1.0

Return

true if any element was removed from the collection, false if the collection was not modified.

actual open override fun retainAll(elements: Collection<E>): Boolean(source)

Retains only the elements in this collection that are contained in the specified collection.

Since Kotlin

1.3

Return

true if any element was removed from the collection, false if the collection was not modified.