code: public void asyncGet(final String url, final boolean nocache, final Callback callback) {		
  		asyncGet(url, null, nocache, callback);
  	}
docs: Retrieve information from a server via a HTTP GET request.
  @param url - URL target of this request
  @param nocache - don't accept an invalidated cached response, and don't store the server's response in any cache
  @param callback - is called back when the response is readable