MultiIterator multiIter = new MultiIterator(readers, extent);
OfflineIteratorEnvironment iterEnv = new OfflineIteratorEnvironment();
DeletingIterator delIter = new DeletingIterator(multiIter, false);
ColumnFamilySkippingIterator cfsi = new ColumnFamilySkippingIterator(delIter);
ColumnQualifierFilter colFilter = new ColumnQualifierFilter(cfsi, new HashSet<Column>(options.fetchedColumns));