add method
Adds value
to the end of this list,
extending the length by one.
The list must be growable.
final numbers = <int>[1, 2, 3];
numbers.add(4);
print(numbers); // [1, 2, 3, 4]
Implementation
@override
void add(E element) {
var len = _list.length;
_notifyChangeLength(len, len + 1);
if (hasListObservers) {
_notifyListChange(len, addedCount: 1);
}
_list.add(element);
}