public static function redirect(
		\Slim\Slim $slim, $name, $to, $routeName = null
	) {
		$routeName = $routeName ?: $name;

		$slim->get( $name, function () use ( $slim, $name, $to ) {
			$slim->flashKeep();
			$slim->redirect( $slim->urlFor( $to ) );
		} )->name( $routeName );
	}