List<Slice<K, N, V>> ret = new ArrayList<Slice<K, N, V>>(1);
if (qr != null) {
List<Row<K, N, V>> rows = qr.get().getList();
for (Row<K, N, V> row : rows) {
ColumnSlice<N, V> colSlice = row.getColumnSlice();
ret.add(new Slice(row.getKey(), toJsonColumns(colSlice.getColumns())));
}
}
return ret;
}