onStop method

Implementation

@override
void onStop() {
  for (final s in _stack) {
    s.reset();
    s.attachSend(null);
    s.interceptor?.onStop();
  }
  _stack.clear();
  for (final b in _base) {
    b.onStop();
  }
  _send = null;
  _emitListeners();
}