removeAt method
Removes and returns the last object in this list.
The list must be growable and non-empty.
final parts = ['head', 'shoulder', 'knees', 'toes'].notifier;
final retVal = parts.removeLast(); // toes
print(parts); // [head, shoulder, knees]
Implementation
@override
E removeAt(int index) => _updateOnAction(() => value.removeAt(index));