/**
 * 发布订阅模式 : 事件总线
 */
export declare class EventBus {
    #private;
    /**
     * 监听事件
     */
    $on(eventType: string, handle: Function): void;
    $emit(eventType: string, ...args: any[]): void;
    $once(eventType: string, handle: Function): void;
    $off(eventType: string, handle: Function): void;
}