import React from 'react'; type OverlayServiceActionType = 'overlay-click'; interface OverlayServiceParams { originalEvent: React.SyntheticEvent; target: HTMLElement; } export interface OverlayServiceOptions { on(action: OverlayServiceActionType, fn: any): void; emit(action: OverlayServiceActionType, params?: OverlayServiceParams): void; off(action: OverlayServiceActionType, fn: any): void; } export declare const OverlayService: OverlayServiceOptions;