declare const EventBus: {
    on: (events: string | string[] | undefined, callback: (data?: any) => void, context?: any) => any;
    off: (events: string | string[] | undefined, callback?: (data?: any) => void) => any;
    sizeOf(event: string | undefined): any;
    emit(event: string | undefined, ...param: any): any;
};
export default EventBus;