code: public void processStreamPartByPart(String delimiterPattern, Function<String, Object> function) {
          StreamUtil.partByPart(dataToType(InputStream.class), delimiterPattern, function);
      }
docs: Process the data InputStream Part By Part orderly.
  Only use this method when data of this response object is an input stream.
  
  @param function         the processing function whose parameter is the input stream part.
  @param delimiterPattern 分段分隔符，支持正则表达式