dispose method

Future<void> dispose()

释放 Context 及其回调、插件和模块状态；重复调用返回同一 Future。

Implementation

Future<void> dispose() {
  final current = _disposeFuture;
  if (current != null) return current;
  _closed = true;
  _owner._detach(this);
  return _disposeFuture = _dispose();
}