public static function admin_init()
 {
     add_filter('wp_unique_post_slug_is_bad_hierarchical_slug', array(__CLASS__, 'is_bad_hierarchical_slug'), 10, 4);
     add_filter('wp_unique_post_slug_is_bad_flat_slug', array(__CLASS__, 'is_bad_flat_slug'), 10, 3);
     $version = tw_get_option('version');
     self::$version = Axl_Testimonials_Widget::VERSION;
     self::$version = apply_filters('tw_version', self::$version);
     if ($version != self::$version) {
         self::initialize_settings();
     }
     if (!Axl_Testimonials_Widget::do_load()) {
         return;
     }
     self::load_options();
     self::register_settings();
 }