presto-main/src/main/java/io/prestosql/sql/planner/iterative/rule/TransformCorrelatedScalarAggregationToJoin.java/TransformCorrelatedScalarAggregationToJoin/getPattern
class TransformCorrelatedScalarAggregationToJoin:    @Override
    public Pattern<CorrelatedJoinNode> getPattern()
    {
        return PATTERN;
    }