export declare class Emitter {
    static of(context?: any): Emitter;
    events: Record<string, Function[]>;
    listeners: Function[];
    context: any;
    constructor(context?: any);
    on(event: string | object | Function, callback?: Function): this;
    off(event?: string, callback?: Function): this;
    once(event: string, callback: Function): this;
    emit(event?: any, ...args: any[]): this;
}

export { }