code: public int getResponseSize() {
          if (records == null) {
              return 1;
          }
  
          int size = 1;
          for (RecordResponse record : records) {
              size += record.getResponseSize();
          }
  
          return size;
      }
docs: getRequestSize -- return the total request size.  This is useful
  for determining if a new record can be added.
  
  @return size in bytes of response.