Available on js
new(?iterable:Any)
read onlysize:Int
clear():Void
delete(key:K):Bool
entries():JsIterator<MapEntry<K, V>>
forEach(callback:(value:V, key:K, map:Map<K, V>) ‑> Void, ?thisArg:Any):Void
get(key:K):Null<V>
has(key:K):Bool
keys():JsIterator<K>
set(key:K, value:V):Map<K, V>
values():JsIterator<V>