code: public String request(String graphPath, Bundle parameters)
              throws MalformedURLException, IOException {
          return request(graphPath, parameters, "GET");
      }
docs: Make a request to the Facebook Graph API with the given string parameters
  using an HTTP GET (default method).
  
  See http://developers.facebook.com/docs/api
  
  Note that this method blocks waiting for a network response, so do not
  call it in a UI thread.
  
  @param graphPath
  Path to resource in the Facebook graph, e.g., to fetch data
  about the currently logged authenticated user, provide "me",
  which will fetch http://graph.facebook.com/me
  @param parameters
  key-value string parameters, e.g. the path "search" with
  parameters "q" : "facebook" would produce a query for the
  following graph resource:
  https://graph.facebook.com/search?q=facebook
  @throws IOException
  @throws MalformedURLException
  @return JSON string representation of the response