export declare class Callback<Args> {
    private funcs;
    private keySeed;
    /** 注册回调函数，返回可用于移除的 key */
    add(func: (args: Args) => any): string;
    /** 按函数引用或 add 返回的 key 移除回调 */
    remove(funcOrKey: ((args: Args) => any) | string): void;
    fire(args: Args): void;
    static create<Args = any>(): Callback<Args>;
}