public void clientPostAction(HeaderSet response, Operation op) throws IOException {
   if (mClientPostAction != null) {
     mClientPostAction.execute(this, response, op);
   }
 }
 public void serverPreAction(HeaderSet request, Operation op) throws IOException {
   if (mServerPreAction != null) {
     mServerPreAction.execute(this, request, op);
   }
 }