/**
  * Sets if cookie is defined to non-default theme.
  */
 public static function load_cookie()
 {
     $theme_name = filter_input(INPUT_COOKIE, self::get_cookie_name());
     if (!$theme_name) {
         return;
     }
     $theme = wp_get_theme($theme_name);
     if ($theme->exists() && $theme->get('Name') !== get_option('current_theme') && $theme->is_allowed()) {
         self::$theme = $theme;
     }
 }