code: func (m *MockWebsocketConn) ReadMessage() (int, []byte, error) {
  	ret := m.ctrl.Call(m, "ReadMessage")
  	ret0, _ := ret[0].(int)
  	ret1, _ := ret[1].([]byte)
  	ret2, _ := ret[2].(error)
  	return ret0, ret1, ret2
  }
docs: // ReadMessage mocks base method