code: func NewTrendingWithClient(client *http.Client) *Trending {
  	baseURL, _ := url.Parse(defaultBaseURL)
  	t := Trending{
  		BaseURL: baseURL,
  		Client:  client,
  	}
  	return &t
  }
docs: // NewTrendingWithClient allows providing a custom http.Client to use for fetching trending items.
  // It allows setting timeouts or using 3rd party http.Client implementations, such as Google App Engine
  // urlfetch.Client.