Simple Stack [LIFO] behaviour Implementation using Dart Programming Language

Stack.dart

class Stack {
  List items;
  Stack(this.items);
  @override
  String toString() => 'List :$items';

  void push(int item) {
    this.items.add(item);
  }

  int pull() {
    return this.items.removeLast();
  }

  bool is_empty() {
    if (this.items == []) {
      return true;
    } else {
      return false;
    }
  }
}

main() {
  var s = Stack([10, 9]);
  s.push(1);
  s.push(2);
  s.push(3);
  print(s);
  print("---------");

  while (!s.is_empty()) {
    int item = s.pull();
    print(item);
  }
}