code: private static void populateRequestOptions(FileRequestOptions modifiedOptions,
              final FileRequestOptions clientOptions, boolean setStartTime) {
          RequestOptions.populateRequestOptions(modifiedOptions, clientOptions, setStartTime);
          if (modifiedOptions.getConcurrentRequestCount() == null) {
              modifiedOptions.setConcurrentRequestCount(clientOptions.getConcurrentRequestCount());
          }
      }
docs: Populates any null fields in the first requestOptions object with values from the second requestOptions object.