updateAll method

  1. @override
void updateAll (V update(K key, V value))
override

Updates all values.

Iterates over all entries in the map and updates them with the result of invoking update.

Implementation 

@override
void updateAll(V update(K key, V value)) {
  for (var key in this.keys) {
    _add(key, update(key, _map[key]), true);
  }
}