okhttp的Request.Builder().url().buid()的Builder()不存在怎么办？

如图，Builder()是红色的不存在，包我导的最新版的，真的不知道怎么回事

 final String url = "http://www.weather.com.cn/data/sk/101010100.html";
//
OkHttpClient okHttpClient = new OkHttpClient();
final okhttp3.Request request = new okhttp3.Request.Builder()
    .url(url)
    .build();
Call call = okHttpClient.newCall(request);       
call.enqueue(new Callback() {
    @Override
    public void onFailure(Call call, IOException e) {
        Log.e(TAG, "onFailure() e=" + e);
    }
    @Override
    public void onResponse(Call call, final Response response) throws IOException {
        Log.i(TAG, " onResponse() reuslt=" + response.body().string());
    }
});