Are there built-in implementations of the stack data structure in the Dart language?

In Dart, there is no separate built-in data structure called "stack" as a distinct class, but a stack can be implemented using the standard List class. In Dart, a list (List) supports the methods add and removeLast, which allow it to be used as a stack (LIFO).

Example of implementing a stack based on List:

class Stack<T> {
  final List<T> _list = [];

  void push(T value) => _list.add(value);

  T pop() => _list.removeLast();

  T get top => _list.isNotEmpty ? _list.last : null;

  bool get isEmpty => _list.isEmpty;
}

Thus, in Dart, List is commonly used for stack operations.