export type EventMap = object;
/** A small typed event emitter, with no dependency on Node's `events`. */
export declare class TypedEventEmitter<Events extends EventMap> {
    private readonly listeners;
    /** Subscribes to an event. Returns a function that unsubscribes. */
    on<Event extends keyof Events>(event: Event, listener: (payload: Events[Event]) => void): () => void;
    /** Subscribes to the next occurrence of an event only. Returns a function that unsubscribes. */
    once<Event extends keyof Events>(event: Event, listener: (payload: Events[Event]) => void): () => void;
    /** Removes a listener. */
    off<Event extends keyof Events>(event: Event, listener: (payload: Events[Event]) => void): void;
    /** Calls every listener of an event, in the order they subscribed. */
    emit<Event extends keyof Events>(event: Event, payload: Events[Event]): void;
    /** Removes every listener of an event, or of every event. */
    removeAllListeners(event?: keyof Events): void;
    /** Listeners of an event. */
    listenerCount(event: keyof Events): number;
}