addAll method

@override void addAll(Iterable<T> values)

Adds all elements to this set.

Equivalent to adding each element in elements using add, but some collections may be able to optimize it.

final characters = <String>{'A', 'B'};
characters.addAll({'A', 'B', 'C'});
print(characters); // {A, B, C}

Implementation

@override
void addAll(Iterable<T> values) {
  assert(ChangesNotifierHelperMixin.debugAssertNotDisposed(this));
  final Set<T> added = _helperToSet(values).difference(_set);
  if (added.isNotEmpty) {
    _set.addAll(added);
    notifyListeners(SetChangeDetails<T>(added, const []));
  }
}