export declare class EventEmitter<T = Record<string, any>> {
    private spliter;
    private maxCacheSize;
    private tree;
    private cache;
    private id;
    constructor(spliter?: string, maxCacheSize?: number);
    on<K extends keyof T & string>(event: K, listener: (payload: T[K]) => void): this;
    off<K extends keyof T & string>(event: K, listener?: (payload: T[K]) => void): this;
    emit<K extends keyof T & string>(event: K, payload: T[K]): this;
    private findListeners;
}