public function append(Response $xResponse)
    {
        if(!$this->xResponse)
        {
            $this->xResponse = $xResponse;
        }
        elseif(get_class($this->xResponse) == get_class($xResponse))
        {
            if($this->xResponse != $xResponse)
            {
                $this->xResponse->appendResponse($xResponse);
            }
        }
        else
        {
            $this->debug($this->trans('errors.mismatch.types', array('class' => get_class($xResponse))));
        }
    }