/// import {ServerRequest, ServerResponse} from "http"; import finalHandler from "finalhandler"; let req: ServerRequest; let res: ServerResponse; let options: { onerror: (err: any, req: ServerRequest, res: ServerResponse) => void; message: boolean|((err: any, status: number) => string); stacktrace: boolean; }; let result: (err: any) => void; result = finalHandler(req, res); result = finalHandler(req, res, options);