public function bulk_footer() {
    parent::bulk_footer();
    $update_actions = array(
      'themes_page'  => '<a href="' . self_admin_url( 'themes.php' ) . '" target="_parent">' . __( 'Return to Themes page' ) . '</a>',
      'updates_page' => '<a href="' . self_admin_url( 'update-core.php' ) . '" target="_parent">' . __( 'Return to WordPress Updates page' ) . '</a>',
    );
    if ( ! current_user_can( 'switch_themes' ) && ! current_user_can( 'edit_theme_options' ) ) {
      unset( $update_actions['themes_page'] );
    }

    
/**
 * Filters the list of action links available following bulk theme updates.
 *
 * @since 3.0.0
 *
 * @param string[] $update_actions Array of theme action links.
 * @param WP_Theme $theme_info     Theme object for the last-updated theme.
 */
    $update_actions = apply_filters( 'update_bulk_theme_complete_actions', $update_actions, $this->theme_info );

    if ( ! empty( $update_actions ) ) {
      $this->feedback( implode( ' | ', (array) $update_actions ) );
    }
  }