throws StandardException {
List<ExpressionNode> groupBy = new ArrayList<>();
if (groupByList != null) {
if (groupByList.isRollup())
{
throw new UnsupportedGroupByRollupException();
}
for (GroupByColumn groupByColumn : groupByList) {
groupBy.add(toOrderGroupBy(groupByColumn.getColumnExpression(),
projects, "GROUP"));
}