import { IStackItem } from '../overlays/OverlayStack.types';
declare type IsContainsInUpperOverlays = (id: string, element: Element, stack: IStackItem[]) => boolean;
export declare const isContainsInUpperOverlays: IsContainsInUpperOverlays;
declare type UniqueId = () => string;
export declare const uniqueId: UniqueId;
export {};