/**
  * Request plugin info and output it.
  */
 public function ajaxRequestInfo()
 {
     if ($_POST['slug'] !== $this->updateChecker->slug) {
         return;
     }
     $this->preAjaxReqest();
     $info = $this->updateChecker->requestInfo();
     if ($info !== null) {
         echo 'Successfully retrieved plugin info from the metadata URL:';
         echo '<pre>', htmlentities(print_r($info, true)), '</pre>';
     } else {
         echo 'Failed to retrieve plugin info from the metadata URL.';
     }
     exit;
 }