Disposable class abstract

Interface for objects that need cleanup when no longer used.

Classes implementing Disposable should release resources, cancel subscriptions, and perform cleanup in their dispose method.

Usage

class MyResource implements Disposable {
  StreamSubscription? _subscription;

  void start() {
    _subscription = someStream.listen(...);
  }

  @override
  void dispose() {
    _subscription?.cancel();
    _subscription = null;
  }
}

Important: Always call dispose when the object is no longer needed to prevent memory leaks.