code: protected function ruleAfter($attribute, array $parameters)
      {
          if (! ($date = strtotime($parameters[0]))) {
              $date = $this->getAttributeName($parameters[0]);
          }
  
          return [$attribute, [$date]];
      }
docs: Returns Javascript parameters for After rule.
  
  @param $attribute
  @param array $parameters
  @return array