export const connections: Set<any>;
/**
 * Using `ws` for testing because the engine uses `ws` for websockets.
 */
export const wss: any;
declare namespace _default {
    function start(callback: any): void;
    function stop(callback: any): void;
    function startAsync(): Promise<any>;
    function stopAsync(): Promise<any>;
    function getCount(): number;
    function setCount(n: any): void;
    function getData(): {};
    function setData(d: any): void;
    function getJobs(): {};
    function setJobs(d: any): void;
    function getHeaders(): {};
    function setHeaders(headers: any): void;
    function setFailedPings(count: any): void;
}
export default _default;