code: public InvokeCallback sendRpcToDefault(String service, String method, Object... args) {
          return sendRpcWithEndpoint("my-rtmps", service, method, args);
      }
docs: <p>
  Send a remote procedure call.
  </p>
  @param service The service handling the call
  @param method The method to call
  @param args Optional arguments to the call
  @return The callback getting called once the rpc returns a result