docs: def _parse_response_for_dict(response):
      ''' Extracts name-values from response header. Filter out the standard
      http headers.'''
  
      if response is None:
          return None
      http_headers = ['server', 'date', 'location', 'host',
                      'via', 'proxy-connection', 'connection']
      return_dict = _HeaderDict()
      if response.headers:
          for name, value in response.headers:
              if not name.lower() in http_headers:
                  return_dict[name] = value
  
      return return_dict