How to use the @angular/router.Router function in @angular/router

function setupTestingRouter(urlSerializer, contexts, location, loader, compiler, injector, routes, opts, urlHandlingStrategy) {
    var router = new Router(null, urlSerializer, contexts, location, injector, loader, compiler, ɵflatten(routes));
    if (opts) {
        // Handle deprecated argument ordering.
        if (isUrlHandlingStrategy(opts)) {
            router.urlHandlingStrategy = opts;
        }
        else {
            // Handle ExtraOptions
            if (opts.malformedUriErrorHandler) {
                router.malformedUriErrorHandler = opts.malformedUriErrorHandler;
            }
            if (opts.paramsInheritanceStrategy) {
                router.paramsInheritanceStrategy = opts.paramsInheritanceStrategy;
            }
        }
    }
    if (urlHandlingStrategy) {

export function setupTestingRouter(urlSerializer, contexts, location, loader, compiler, injector, routes, opts, urlHandlingStrategy) {
    var router = new Router(null, urlSerializer, contexts, location, injector, loader, compiler, flatten(routes));
    if (opts) {
        // Handle deprecated argument ordering.
        if (isUrlHandlingStrategy(opts)) {
            router.urlHandlingStrategy = opts;
        }
        else {
            // Handle ExtraOptions
            if (opts.malformedUriErrorHandler) {
                router.malformedUriErrorHandler = opts.malformedUriErrorHandler;
            }
            if (opts.paramsInheritanceStrategy) {
                router.paramsInheritanceStrategy = opts.paramsInheritanceStrategy;
            }
        }
    }
    if (urlHandlingStrategy) {

useFactory: (resolver:ComponentResolver, urlSerializer:UrlSerializer,
                   outletMap:RouterOutletMap, location:Location, injector:Injector) => {
        return new Router(
          rootComponentType, resolver, urlSerializer, outletMap, location, injector, config);
      },
      deps: [ComponentResolver, UrlSerializer, RouterOutletMap, Location, Injector]

export function setupTestingRouter(urlSerializer, outletMap, location, loader, compiler, injector, routes) {
    return new Router(null, urlSerializer, outletMap, location, injector, loader, compiler, flatten(routes));
}
/**

export function setupTestingRouter(urlSerializer, outletMap, location, loader, compiler, injector, routes) {
    return new Router(null, urlSerializer, outletMap, location, injector, loader, compiler, flatten(routes));
}
/**

function setupTestingRouter(urlSerializer, contexts, location, loader, compiler, injector, routes, urlHandlingStrategy) {
    const router = new Router(null, urlSerializer, contexts, location, injector, loader, compiler, ɵflatten(routes));
    if (urlHandlingStrategy) {
        router.urlHandlingStrategy = urlHandlingStrategy;
    }
    return router;
}
/**

function setupTestingRouter(urlSerializer, outletMap, location, loader, compiler, injector, routes, urlHandlingStrategy) {
    var router = new Router(null, urlSerializer, outletMap, location, injector, loader, compiler, ɵflatten(routes));
    if (urlHandlingStrategy) {
        router.urlHandlingStrategy = urlHandlingStrategy;
    }
    return router;
}
/**

function setupTestingRouter(urlSerializer, outletMap, location, loader, compiler, injector, routes, urlHandlingStrategy) {
    const router = new Router(null, urlSerializer, outletMap, location, injector, loader, compiler, ɵflatten(routes));
    if (urlHandlingStrategy) {
        router.urlHandlingStrategy = urlHandlingStrategy;
    }
    return router;
}
/**

useFactory: (resolver:ComponentResolver, urlSerializer:UrlSerializer,
                   outletMap:RouterOutletMap, location:Location, injector:Injector) => {
        return new Router(
          rootComponentType, resolver, urlSerializer, outletMap, location, injector, config);
      },
      deps: [ComponentResolver, UrlSerializer, RouterOutletMap, Location, Injector]

function setupTestingRouter(urlSerializer, contexts, location, loader, compiler, injector, routes, urlHandlingStrategy) {
    var router = new Router(null, urlSerializer, contexts, location, injector, loader, compiler, ɵflatten(routes));
    if (urlHandlingStrategy) {
        router.urlHandlingStrategy = urlHandlingStrategy;
    }
    return router;
}
/**