removeWhere method
- bool test(- V
 
override
    Removes all elements of this set that satisfy test.
final characters = <String>{'A', 'B', 'C'};
characters.removeWhere((element) => element.startsWith('B'));
print(characters); // {A, C}
Implementation
@override
void removeWhere(bool Function(V) test) {
  var toRemove = <K>[];
  _baseMap.forEach((key, value) {
    if (test(value)) toRemove.add(key);
  });
  toRemove.forEach(_baseMap.remove);
}