/**
  * Initialize the plugin by loading admin scripts & styles and adding a
  * settings page and menu.
  *
  * @since     0.0.1
  */
 private function __construct()
 {
     $plugin = Idea_Factory::get_instance();
     $this->plugin_slug = $plugin->get_plugin_slug();
     require_once IDEA_FACTORY_DIR . '/admin/includes/class.settings.php';
     require_once IDEA_FACTORY_DIR . '/admin/includes/class.meta.php';
     require_once IDEA_FACTORY_DIR . '/admin/includes/class.column-mods.php';
 }
 /**
  * Return an instance of this class.
  *
  * @since     0.0.1
  *
  * @return    object    A single instance of this class.
  */
 public static function get_instance()
 {
     // If the single instance hasn't been set, set it now.
     if (null == self::$instance) {
         self::$instance = new self();
     }
     return self::$instance;
 }