export declare namespace menu {
    function next(items: HTMLSmoothlyItemElement[], direction: -1 | 1): {
        current?: HTMLSmoothlyItemElement;
        next: HTMLSmoothlyItemElement;
    };
    function hasVisibleItems(items: HTMLSmoothlyItemElement[]): boolean;
    function markOnly(items: HTMLSmoothlyItemElement[], item: HTMLSmoothlyItemElement): void;
    function findFirstSelected(items: HTMLSmoothlyItemElement[]): HTMLSmoothlyItemElement | undefined;
    function findFirstMarked(items: HTMLSmoothlyItemElement[]): HTMLSmoothlyItemElement | undefined;
}