getSerializer(columnNameSerializer), getSerializer(valueSerializer))
.setColumnFamily(columnFamily)
.setRange(null, null, false, numCols).setRowCount(numRows);
//.setKeys(lastKey, null);
QueryResult<OrderedRows<K, N, V>> result = rangeSlicesQuery.execute();
OrderedRows<K, N, V> orderedRows = result.get();
List<Row<K, N, V>> rows = orderedRows.getList();
return getRows(rows);