private function _show_original_link($entity)
 {
     if (empty($this->previewer->admin_page)) {
         return;
     }
     $owner = $entity->get_owner();
     if ($owner->id() != $this->previewer->admin_page->site_id) {
         return;
     }
     echo '<tr id="original_link_Row">';
     $this->previewer->_row = $this->previewer->_row % 2;
     $this->previewer->_row++;
     echo '<td class="listRow' . $this->previewer->_row . ' col1">';
     echo 'Original file URL:';
     echo '</td>';
     echo '<td class="listRow' . $this->previewer->_row . ' col2">';
     $shim = new KalturaShim();
     $file_ext = $shim->get_source_file_extension($entity);
     if ($orig_url = $shim->get_original_data_url($entity->get_value('entry_id'))) {
         echo '<a href="' . htmlspecialchars($orig_url) . '">' . htmlspecialchars($orig_url) . '</a>';
         if (!empty($file_ext)) {
             echo ' (.' . $file_ext . ')' . "\n";
         }
     } else {
         echo '(No original available)';
     }
     echo '</td>';
     echo '</tr>';
 }