code: func (m *MockReceivedPacketHandler) GetAckFrame(arg0 protocol.EncryptionLevel) *wire.AckFrame {
  	m.ctrl.T.Helper()
  	ret := m.ctrl.Call(m, "GetAckFrame", arg0)
  	ret0, _ := ret[0].(*wire.AckFrame)
  	return ret0
  }
docs: // GetAckFrame mocks base method