public function deleteZone()
 {
     REST::requireRequestMethod('DELETE');
     $requiredParameters = array('zoneid');
     if (Util::isValid($requiredParameters, $values, $this->params)) {
         extract($values);
         if (Model::deleteZone($zoneid)) {
             REST::sendResponse(200);
         } else {
             REST::sendResponse(500);
         }
     } else {
         REST::sendResponse(400);
     }
 }