PreferredChoice example

return new GroupBy($formType, $groupBy, $vary);
    }

    /** * Decorates a "preferred_choices" option to make it cacheable. * * @param callable|array $preferred Any pseudo callable or array to return a group name from a choice * @param mixed $vary Dynamic data used to compute a unique hash when caching the option */
    public static function preferred(FormTypeInterface|FormTypeExtensionInterface $formType, callable|array $preferred, mixed $vary = null): PreferredChoice
    {
        return new PreferredChoice($formType, $preferred, $vary);
    }

    /** * Should not be instantiated. */
    private function __construct()
    {
    }
}