declare const $listeners: unique symbol;
interface EventListenerOptions {
    once?: true;
}
declare type EventListener = Map<Function, EventListenerOptions>;
declare type EventEmitterListeners = Map<string, EventListener>;
export declare class EventEmitter {
    [$listeners]: EventEmitterListeners;
    on(event: string, ...listeners: Function[]): this;
    once(event: string, ...listeners: Function[]): this;
    off(event?: string, ...listeners: Function[]): this;
    emit(event: string, ...args: any[]): this;
    stream(event: string): import("./streams").PubbyStream<unknown, unknown>;
}
export {};