export type Listener = (...args: any[]) => Promise<any> | void;
export type DefaultEventMap = {
    [event in (string | symbol)]: Listener;
} & {
    /**
     * __proto__ key not allowed due to implementation
     * add prefix, if you want to use this keyword
     */
    __proto__?: never;
};
export interface IEventEmitter<EventMap extends DefaultEventMap = DefaultEventMap> {
    emit<EventKey extends keyof EventMap>(event: EventKey, ...args: Parameters<EventMap[EventKey]>): boolean;
    on<EventKey extends keyof EventMap = string>(event: EventKey, listener: EventMap[EventKey]): this;
    once<EventKey extends keyof EventMap = string>(event: EventKey, listener: EventMap[EventKey]): this;
    addListener<EventKey extends keyof EventMap = string>(event: EventKey, listener: EventMap[EventKey]): this;
    removeListener<EventKey extends keyof EventMap = string>(event: EventKey, listener: EventMap[EventKey]): this;
    prependListener<EventKey extends keyof EventMap = string>(event: EventKey, listener: EventMap[EventKey]): this;
    prependOnceListener<EventKey extends keyof EventMap = string>(event: EventKey, listener: EventMap[EventKey]): this;
    off<EventKey extends keyof EventMap = string>(event: EventKey, listener: EventMap[EventKey]): this;
    removeAllListeners<EventKey extends keyof EventMap = string>(event?: EventKey): this;
    setMaxListeners(n: number): this;
    getMaxListeners(): number;
    listeners<EventKey extends keyof EventMap = string>(event: EventKey): EventMap[EventKey][];
    rawListeners<EventKey extends keyof EventMap = string>(event: EventKey): EventMap[EventKey][];
    eventNames(): Array<string | symbol>;
    listenerCount<EventKey extends keyof EventMap = string>(type: EventKey): number;
}