presto-main/src/main/java/io/prestosql/sql/planner/iterative/rule/RemoveUnreferencedScalarApplyNodes.java/RemoveUnreferencedScalarApplyNodes/apply
class RemoveUnreferencedScalarApplyNodes:    @Override
    public Result apply(ApplyNode applyNode, Captures captures, Context context)
    {
        return Result.ofPlanNode(applyNode.getInput());
    }