code: protected void skipResponseStatusExceptionParsing(String json) throws ResponseErrorJsonParsingException {
      // If this is not an object, it's not an error response.
      if (!json.startsWith("{")) {
        throw new ResponseErrorJsonParsingException();
      }
  
      int subStrEnd = Math.min(50, json.length());
      if (!json.substring(0, subStrEnd).contains("\"error\"")) {
        throw new ResponseErrorJsonParsingException();
      }
    }
docs: checks if a string may be a json and contains a error string somewhere, this is used for speedup the error parsing
  
  @param json