问Ngx:应该使用哪个UrlTree构造函数？

EN

const anUrlTree = new UrlTree(root, someParams, aFragment);

export declare class UrlTree {
    /** The root segment group of the URL tree */
    root: UrlSegmentGroup;
    /** The query params of the URL */
    queryParams: Params;
    /** The fragment of the URL */
    fragment: string | null;
    get queryParamMap(): ParamMap;
    /** @docsNotRequired */
    toString(): string;
}

    const nextTree = new UrlTree();
    urlTree.root = root;
    urlTree.queryParams = someParams;
    urlTree.fragment = aFragment;