RPCManager.send(DSCallback callback, DSRequest requestProperties)?

[changhua0313]

Is there a RPCManager.send(DSCallback callback, DSRequest requestProperties) to submit a request and make use of its callback?

I only find
RPCManager.send(String data, RPCCallback callback, Map requestParams) method
How can set my request URL in this method?

OR

How can I specify DSCallback to process the response in the following mthod?
RPCManager.sendRequest(RPCRequest rpcRequestProperties)