export declare function getClosestAccordion(el: HTMLElement | null): HTMLElement | null;
export declare function getSiblingButtons(item: HTMLElement): HTMLElement[] | null;
export declare function focusFirstSiblingOf(item: HTMLElement): void;
export declare function focusLastSiblingOf(item: HTMLElement): void;
export declare function focusNextSiblingOf(item: HTMLElement): void;
export declare function focusPreviousSiblingOf(item: HTMLElement): void;
