How to get the response from the web services.

I m sending a request object to web services ant that service is returning a complex response object which i want to display on the screen.I m invoking the web services using following code:

wdContext.currentRequest_CommonGenesChargesPortType_viewMOPElement().modelObject().execute();

wdContext.nodeViewMOPResponse().invalidate();

So could anybody tell me from where acn i get the response object ,from which statement.

i.e:can i do (Response Object)=wdContext.currentRequest_CommonGenesChargesPortType_viewMOPElement().modelObject().execute();

or

(Response Object)=wdContext.nodeViewMOPResponse().invalidate();

i.e which statement will return the response object.