export interface CreateFocusableTreeWalkerOptions {
    acceptElement?: (element: HTMLElement) => boolean;
}
export declare function createFocusableTreeWalker(root: HTMLElement, { acceptElement }?: CreateFocusableTreeWalkerOptions): TreeWalker;
export interface IsFocusableElementOptions {
    rootElement?: HTMLElement;
}
export declare function isFocusableElement(element: HTMLElement, { rootElement }?: IsFocusableElementOptions): any;