code: func Post(dst []byte, url string, postArgs *Args) (statusCode int, body []byte, err error) {
  	return defaultClient.Post(dst, url, postArgs)
  }
docs: // Post sends POST request to the given url with the given POST arguments.
  //
  // The contents of dst will be replaced by the body and returned, if the dst
  // is too small a new slice will be allocated.
  //
  // The function follows redirects. Use Do* for manually handling redirects.
  //
  // Empty POST body is sent if postArgs is nil.