private function deleteContentTypeAndTaxonomies($id)
 {
     $deleted = Content_Type::deleteContentType((int) $id);
     if (!$deleted) {
         return new WP_Error(500, "Could not delete content type");
         exit;
     } else {
         echo "<div class='wrap'>Deleted</div>";
         $this->content_types_admin_index();
     }
 }