/// <reference types="node" />
import { Server } from 'http';
import { Route } from './Route';
import { Emitter } from './@types/Emitter';
import { LineInfo } from './@types';
/**
 * @internal
 * @param server
 * @return Server listening port or null if the server is not started
 */
export declare function getServerPort(server: Server): number | null;
/**
 * @deprecated Use route.logDiff() instead
 *
 * LogDiff between an unmatched request and the given route
 *
 * @param emitter Stubborn instance
 * @param route Route
 */
export declare function logDiffOn501(emitter: Emitter, route: Route): void;
export declare function findCaller(): LineInfo | null;