How to use the @uifabric/example-app-base/lib/index2.jumpToAnchor function in @uifabric/example-app-base

this._jumpInterval = this._async.setInterval(() => {
        const el = document.getElementById(anchor);
        if (el || Date.now() - start > 1000) {
          this._async.clearInterval(this._jumpInterval);
          this._jumpInterval = undefined;
          if (el) {
            jumpToAnchor(anchor);
          }
        }
      }, 100);
    }