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
// TODO: Dart 2.0 requires this method to be implemented.
// ignore: override_on_non_overriding_method
void updateAll(V update(K key, V value)) {
  throw new UnimplementedError("updateAll");
}