/**
  * Initialize the settings page for the backend
  *
  * @access public
  * @since  0.2
  */
 public function settings_page()
 {
     if (is_admin()) {
         CPT_Date_Archive_Settings::init();
     }
 }
 /**
  * Singleton model
  *
  * @access public
  * @since  0.2
  */
 public static function init()
 {
     if (!isset(self::$instance)) {
         self::$instance = new CPT_Date_Archive_Settings();
     }
     return self::$instance;
 }