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