def fetch_page(url, referer = nil, depth = nil, user_data = nil)
      fetch_pages(url, referer, depth, user_data).last
    end
def fetch_page(url, referer = nil, depth = nil, user_data = nil)
      fetch_pages(url, referer, depth, user_data).last
    end
Fetch a single Page from the response of an HTTP request to *url*.
 Just gets the final destination page.