public function update_rules()
{
$post_types = CPTP_Util::get_post_types();
foreach ($post_types as $post_type) {
add_action('update_option_' . $post_type . '_structure', array(__CLASS__, 'queue_flush_rules'), 10, 2);
}
add_action('update_option_no_taxonomy_structure', array(__CLASS__, 'queue_flush_rules'), 10, 2);
}