ReviewerReviewStep3Form.inc.php

<?php
 
import('lib.pkp.classes.submission.reviewer.form.PKPReviewerReviewStep3Form');
 
class ReviewerReviewStep3Form extends PKPReviewerReviewStep3Form {
 
   function __construct($request, $reviewerSubmission, $reviewAssignment) {
      parent::__construct($request, $reviewerSubmission, $reviewAssignment, 3);
      $this->addCheck(new FormValidatorCustom($this, 'recommendation', 'required', 'reviewer.submission.reviewFormResponse.form.recommendationRequired', function($recommendation) {
         return isset($recommendation);
      }));     
   }
}