public function decoratordeleteAction()
 {
     $this->_helper->layout->disableLayout();
     $this->_helper->viewRenderer->setNoRender(true);
     $service = new EngineBlock_Service_GroupProviderDecorator();
     return $service->delete(htmlentities($this->_getParam('group_provider_id')), htmlentities($this->_getParam('decorator_id')));
 }