kotlin.collections.MutableMap.put
put
abstract fun put(key: K, value: V): V?
Associates the specified value with the specified key in the map.
Return the previous value associated with the key, or null if the key was not present in the map.
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Licensed under the Apache License, Version 2.0.
https://kotlinlang.org/api/latest/jvm/stdlib/kotlin.collections/-mutable-map/put.html
