kotlinx-collections-immutable/kotlinx.collections.immutable.implementations.immutableList/AbstractPersistentList/retainAll

retainAll

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

Returns all elements in this list that are also contained in the specified elements collection.

Return

a new persistent list with elements in this list that are also contained in the specified elements collection; or this instance if no modifications were made in the result of this operation.