code: public function preDispatch()
      {
          parent::preDispatch();
  
          if (!Mage::helper('sheep_debug')->isAllowed()) {
              $this->setFlag('', 'no-dispatch', true);
              $this->getResponse()->setHttpResponseCode(404);
          }
      }
docs: Prevent access to our access if toolbar is disabled
  
  @throws Zend_Controller_Response_Exception