export declare function getActiveElement(): HTMLElement | null;
export declare function isElementInScope(scope: Element, element: Element): boolean;
export declare function isFocusFree(): boolean;
export declare function createGuard(tabIndex: number): HTMLSpanElement;
export declare function isGuard(node: HTMLElement): boolean;
export declare function removeElementFromDocument(element: Element): void;
export declare function focusFirstIn(scope: HTMLElement): void;
export declare function getNextTabbableIndex(current: number, count: number, step: number): number;