/**
 * This file is part of the NocoBase (R) project.
 * Copyright (c) 2020-2024 NocoBase Co., Ltd.
 * Authors: NocoBase Team.
 *
 * This project is dual-licensed under AGPL-3.0 and NocoBase Commercial License.
 * For more information, please refer to: https://www.nocobase.com/agreement.
 */
export declare class Emitter {
    private events;
    private paused;
    setPaused(paused: boolean): void;
    on(event: string, callback: (...args: any[]) => void): void;
    off(event: string, callback: (...args: any[]) => void): void;
    emit(event: string, ...args: any[]): void;
    /**
     * 异步触发事件：按监听器注册顺序依次（串行）等待执行完成。
     * - 若某个监听器抛错/Promise reject，将中断后续执行并将异常向上传递（便于调用方统一处理）。
     * - 当前不提供并行触发能力；如需并发处理，请在监听器内部自行管理（例如在回调内使用 Promise.all）。
     */
    emitAsync(event: string, ...args: any[]): Promise<void>;
}