clear method
void
clear()
override
Removes all objects from this list; the length of the list becomes zero.
The list must be growable.
final numbers = <int>[1, 2, 3];
numbers.clear();
print(numbers.length); // 0
print(numbers); // []
Implementation
void clear() {
_inner.clear();
_changes.add(ListChange<E>.clear());
}