open fun containsKey(key: K): Boolean
Overrides HashMap.containsKey
Overrides Map.containsKey
Platform and version requirements: JS
Returns true if the map contains the specified key.
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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-linked-hash-map/-linked-hash-map/contains-key.html