/**
 * @module stdlib
 */
import { Client } from '../client';
import { Account } from '../models';
import { PlayerData } from '../../common';
/**
 * An extended Client class that provides player tracking functionality
 * by exposing a `players` array and an event emitter for `enter` and `leave` events.
 */
export declare class PlayerTrackerClient extends Client {
    /**
     * An array of all players which are visible to the client.
     */
    players: PlayerData[];
    private emitter;
    constructor(account: Account);
    on(event: 'enter' | 'leave', listener: (player: PlayerData) => void): this;
    once(event: 'enter' | 'leave', listener: (player: PlayerData) => void): this;
    removeListener(event: 'enter' | 'leave', listener: (player: PlayerData) => void): this;
}