presto-main/src/main/java/io/prestosql/sql/planner/optimizations/PlanNodeSearcher.java/PlanNodeSearcher/recurseOnlyWhen
class PlanNodeSearcher:    public PlanNodeSearcher recurseOnlyWhen(Predicate<PlanNode> skipOnly)
    {
        this.recurseOnlyWhen = requireNonNull(skipOnly, "recurseOnlyWhen is null");
        return this;
    }