code: def parse_request_headers(headers):
      
      request_header_keys = set(headers.keys(lower=True))
      request_meta_keys = set(XHEADERS_TO_ARGS_DICT.keys())
      data_header_keys = request_header_keys.intersection(request_meta_keys)
      return dict(([XHEADERS_TO_ARGS_DICT[key],
                    headers.get(key, None)] for key in data_header_keys))
docs: convert headers in human readable format
  
      :param headers:
      :return: