@Override
public void packRowData(FDBStore store, Session session,
FDBStoreData storeData, RowData rowData) {
RowDef rowDef = rowDefFromId(((Group)object).getRoot(), rowData.getRowDefId());
if (rowDef == null) {
throw new AkibanInternalException("Cannot find table " + rowData);
}
RowDataValueSource valueSource = new RowDataValueSource();
int nfields = rowDef.getFieldCount();
Map<String,Object> value = new HashMap<>(nfields); // Intermediate form of value.
for (int i = 0; i < nfields; i++) {