presto-main/src/main/java/io/prestosql/sql/planner/iterative/rule/TransformCorrelatedInPredicateToJoin.java/TransformCorrelatedInPredicateToJoin/TransformCorrelatedInPredicateToJoin
class TransformCorrelatedInPredicateToJoin:    public TransformCorrelatedInPredicateToJoin(Metadata metadata)
    {
        countFunction = metadata.resolveFunction(QualifiedName.of("count"), ImmutableList.of());
    }