Weak hands cannot be planted, meager skills have no foundation. Shallow wisdom is futile, how can one hope for a good name?扰扰从役倦，屑屑身事微。少壮轻年月，迟暮惜光辉。
$shortcode_objects.
*/
private $shortcodes = [];
/**
* Main PUM_Shortcodes Instance
*
* @return PUM_Shortcodes
*/
public static function instance() {
if ( ! isset( self::$instance ) && ! ( self::$instance instanceof PUM_Shortcodes ) ) {
self::$instance = new self();
}