/**
  * Creates JsValidator instance based on Validator
  *
  * @param ValidatorContract $validator
  * @param string|null $selector
  * @return Manager
  */
 protected function createValidator(ValidatorContract $validator, $selector = null)
 {
     if (!empty($selector)) {
         $this->js->setSelector($selector);
     }
     $this->js->setValidator($validator);
     return $this->js;
 }