presto-main/src/main/java/io/prestosql/sql/planner/iterative/rule/PushAggregationThroughOuterJoin.java/PushAggregationThroughOuterJoin/isEnabled
class PushAggregationThroughOuterJoin:    @Override
    public boolean isEnabled(Session session)
    {
        return shouldPushAggregationThroughJoin(session);
    }