public function has_element_in_scope( $tag_name ) {
    return $this->has_element_in_specific_scope(
      $tag_name,
      array(

        /*
				 * Because it's not currently possible to encounter
				 * one of the termination elements, they don't need
				 * to be listed here. If they were, they would be
				 * unreachable and only waste CPU cycles while
				 * scanning through HTML.
				 */
      )
    );
  }