type Listener = (...args: any[]) => void;
export declare class EventEmitter {
    private readonly events;
    on(event: string, listener: Listener): () => void;
    removeListener(event: string, listener?: Listener): void;
    removeAllListeners(): void;
    emit(event: string, ...args: any[]): void;
    once(event: string, listener: Listener): () => void;
}
export {};