ConcurrentMap

class ConcurrentMap<Key, Value> : MutableMap<Key, Value>

ConcurrentMap(
    lock: Lock = Lock(), 
    delegate: MutableMap<Key, Value> = mutableMapOf<Key, Value>())

entries	`val entries: MutableSet<MutableEntry<Key, Value>>`
keys	`val keys: MutableSet<Key>`
size	`val size: Int`
values	`val values: MutableCollection<Value>`

clear	`fun clear(): Unit`
computeIfAbsent	`fun computeIfAbsent(key: Key, block: () -> Value): Value` Perform concurrent get and compute block if no associated value found in the map and insert the new value.
containsKey	`fun containsKey(key: Key): Boolean`
containsValue	`fun containsValue(value: Value): Boolean`
get	`fun get(key: Key): Value?`
getOrDefault	`fun getOrDefault(key: Key, block: () -> Value): Value` Perform concurrent insert.
isEmpty	`fun isEmpty(): Boolean`
put	`fun put(key: Key, value: Value): Value?`
putAll	`fun putAll(from: Map<out Key, Value>): Unit`
remove	`fun remove(key: Key): Value?`