presto-main/src/main/java/io/prestosql/sql/planner/optimizations/AddLocalExchanges.java/Rewriter/visitOutput
class Rewriter:        @Override
        public PlanWithProperties visitOutput(OutputNode node, StreamPreferredProperties parentPreferences)
        {
            return planAndEnforceChildren(
                    node,
                    any().withOrderSensitivity(),
                    any().withOrderSensitivity());
        }