Requirement::isFulfilled PHP Метод

    public function isFulfilled()
    {
        return $this->fulfilled;
    }

 /**
  * Prints a Requirement instance
  */
 private function echo_requirement(\Requirement $requirement)
 {
     $result = $requirement->isFulfilled() ? 'OK' : ($requirement->isOptional() ? 'WARNING' : 'ERROR');
     $data = '';
     switch (rtrim(ltrim(str_pad($result, 9)))) {
         case 'OK':
             $data .= '<tr class="success">';
             break;
         case 'WARNING':
             $data .= '<tr class="warning">';
             break;
         case 'ERROR':
             $data .= '<tr class="danger">';
             break;
         default:
             $data .= '<tr>';
             break;
     }
     $data .= '<td>' . str_pad($result, 9) . '</td>';
     $data .= '<td>' . $requirement->getTestMessage() . "</td>";
     if (!$requirement->isFulfilled()) {
         $data .= '<td>' . $requirement->getHelpText() . '</td>';
     }
     $data .= '</tr>';
     return $data;
 }