code: @Deprecated
      public int sendRpc(String endpoint, String service, String method, Object... args) {
          RemotingMessage message = createRemotingMessage(endpoint, service, method, args);
          Invoke invoke = createAmf3InvokeSkeleton(null, message);
  
          send(invoke);
          return invoke.getInvokeId();
      }
docs: Send a remote procedure call.
  @param endpoint The endpoint of the call
  @param service The service handling the call
  @param method The method to call
  @param args Optional args to the call
  @return The id of the callback
  @deprecated Due to method resolution ambiguities, this method is due to be removed within the next couple
  of releases. Use the explicit {@link #sendRpcWithEndpoint(String, String, String, Object...)} instead.