open fun retainAll(elements: Collection<E>): Boolean
Platform and version requirements: JS
Retains only the elements in this collection that are contained in the specified collection.
Return true if any element was removed from the collection, false if the collection was not modified.
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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-abstract-mutable-collection/retain-all.html