code: private Iterator<RecordEntryRawMetadata> rawMetadataFromCql(final Iterator<Row> iter) {
          return Iterators.transform(iter, row -> new RecordEntryRawMetadata()
                  .withTimestamp(TimeUUIDs.getTimeMillis(getChangeId(row)))
                  .withSize(getValue(row).remaining()));
      }
docs: Converts the rows from the provided iterator into raw metadata.