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containsKey

Platform and version requirements: JVM (1.0), JS (1.0), Native (1.0)
fun <K> Map<out K, *>.containsKey(key: K): Boolean

Returns true if the map contains the specified key.

Allows to overcome type-safety restriction of containsKey that requires to pass a key of type K.

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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/contains-key.html