/**
  * Returns true if the callback request.
  * @return boolean true if callback request, false otherwise.
  */
 public function isCallbackRequest()
 {
     if ($this->uri->isServerRequest() && !$this->uri->isClientRequest()) {
         $uri = $this->uri->getRequestUri();
         $request = new TAjaxRequest($uri, $this->objects);
         return $request->resolve() instanceof TAjaxProxy;
     }
     return false;
 }
 /**
  * Serve AJAX remote object requests.
  */
 protected function serve()
 {
     $request = new TAjaxRequest($this->uri->getRequestUri(), $this->objects);
     $this->invoke($request->resolve());
 }