dispose method

@override Future<void> dispose()

Implementation

@override
Future<void> dispose() {
  return Future<void>.sync(() {
    if (this._disposed != true) {
      if (this._disposingFuture == null) {
        this._disposingFuture = Future<void>.value();
        final onDisposeResult = this.onDispose();
        if (onDisposeResult is Future<void>) {
          this._disposingFuture = this
              ._disposingFuture!
              .then((_) => onDisposeResult)
              .whenComplete(() {
            this._disposingFuture = null;
            this._disposed = true;
          });
          return this._disposingFuture;
        } else {
          this._disposed = true;
          this._disposingFuture = null;
        }
      } else {
        return this._disposingFuture;
      }
    }
  }).catchError((Object err) {
    final ex = FException.wrapIfNeeded(err);
    print(
      "Dispose method raised an error. This is unexpected behavior due dispose() should be exception safe. The error was bypassed.\n${ex.toString()}",
    );
    throw FExceptionDisposingFailure(ex, this);
  });
}