open operator fun contains(element: E): Boolean
Overrides AbstractCollection.contains
Overrides Collection.contains
Overrides Set.contains
Platform and version requirements: JS
Checks if the specified element is contained in this collection.
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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-hash-set/-hash-set/contains.html