remove method Null safety

  1. @override
bool remove(
  1. Object? E
)

Removes the first occurrence of value from this list.

Returns true if value was in the list, false otherwise.

var parts = ['head', 'shoulders', 'knees', 'toes'];
parts.remove('head'); // true
parts.join(', ');     // 'shoulders, knees, toes'

The method has no effect if value was not in the list.

// Note: 'head' has already been removed.
parts.remove('head'); // false
parts.join(', ');     // 'shoulders, knees, toes'

The list must be growable.

Implementation

@override
bool remove(Object? E) {
  // Stop listening to child
  if (_propagateNotification &&
      E != null &&
      E is ChangeNotifier &&
      _values.contains(E)) E.removeListener(_propagate);

  bool result = _values.remove(E);
  if (result) notifyListeners();

  return result;
}