private void persistIndex(PersistIndex action, MetaLookup mgr, MutationBatch m) {
String indexCfName = action.getIndexCfName();
Info info = columnFamilies.lookupOrCreate2(indexCfName, mgr);
ColumnFamily cf = info.getColumnFamilyObj();
ColumnListMutation colMutation = m.withRow(cf, action.getRowKey());
Object toPersist = createObjectToUse(action, info);
colMutation.putEmptyColumn(toPersist);
}