android发送透传消息 ： CmdMessageBody 这个类属于哪个包啊？怎么找不到

public void onCmdMessageReceived(List<EMMessage> messages) {

			    for (EMMessage message : messages) {

                    EMLog.d(TAG, "receive command message");

                    //get message body

                    EMCmdMessageBody cmdMsgBody = (EMCmdMessageBody) message.getBody();

                    final String action = cmdMsgBody.action();//获取自定义action

                    //red packet code : 处理红包回执透传消息

                    if(!easeUI.hasForegroundActivies()){

                        if (action.equals(RPConstant.REFRESH_GROUP_RED_PACKET_ACTION)){

                            RedPacketUtil.receiveRedPacketAckMessage(message);

                            broadcastManager.sendBroadcast(new Intent(RPConstant.REFRESH_GROUP_RED_PACKET_ACTION));

                        }

                    }



                    if (action.equals("__Call_ReqP2P_ConferencePattern")) {

                        String title = message.getStringAttribute("em_apns_ext", "conference call");

                        Toast.makeText(appContext, title, Toast.LENGTH_LONG).show();

                    }

                    //end of red packet code

                    //获取扩展属性 此处省略

                    //maybe you need get extension of your message

                    //message.getStringAttribute("");

                    EMLog.d(TAG, String.format("Command：action:%s,message:%s", action,message.toString()));

                }

			}