public function callback_action_purge_data() {
    $this->callback_action_flush_news_sitemap_cache();
    $this->librarian->delete_all_stored_sitemap_data();
    
/** This filter is documented in modules/sitemaps/sitemaps.php */
    $delay = apply_filters( 'jetpack_sitemap_generation_delay', MINUTE_IN_SECONDS * wp_rand( 1, 15 ) ); // Randomly space it out to start within next fifteen minutes.
    wp_schedule_single_event( time() + $delay, 'jp_sitemap_cron_hook' );
  }