app/src/main/java/safeluck/drive/evaluation/im/IMSClientBootstrap.java
@@ -107,4 +107,10 @@
            imsClient.sendMsg(message);
        }
    }
    public void addHeartbeat(int seconds){
        if (isActive){
            imsClient.addHeartbeatHandler(seconds);
        }
    }
}