public void callAsync( byte channel, short objId, short procId, Object... args ) {
        rpc.callAsync(channel, objId, procId, args);
    }
Performs an asynchronous call on the server against the specified
 object using the specified procedure ID.  Communication is done
 over the specified channel.  No responses are received and none
 are waited for.
jme3-networking/src/main/java/com/jme3/network/service/rpc/RpcClientService.java