/// <reference types="node" />
import { EventEmitter } from 'events';
import WS from 'ws';
import { XapiRequest } from '../xapi/types';
import { Backend } from './';
export default class WSBackend extends EventEmitter implements Backend {
    private ws;
    private isReady;
    constructor(urlOrWS: WS | WebSocket | string);
    close(): void;
    execute(command: XapiRequest): Promise<void>;
    private handleClose;
    private handleError;
    private handleMessage;
}