Parsing error with local methods

[VISTALL]

public void test()
{

  {
                    onSuccess = joinCallbacks(initialCheckIn.InvokeSuccessCallback, onSuccess);
                    onError = joinCallbacks(initialCheckIn.ErrorCallback, onError);
                    networkErrorCallback = joinCallbacks(initialCheckIn.NetworkErrorCallback, networkErrorCallback);

                    Action<T> joinCallbacks<T>(Action<T> initialCallback, Action<T> postCallback) {
                        return value => initialCheckIn.InvokeCallbacks(initialCallback, postCallback, value);
                    }
                }
  }
}