presto-main/src/main/java/io/prestosql/sql/planner/optimizations/PropertyDerivations.java/PropertyDerivations/visitDistinctLimit
class PropertyDerivations:        @Override
        public ActualProperties visitDistinctLimit(DistinctLimitNode node, List<ActualProperties> inputProperties)
        {
            ActualProperties properties = Iterables.getOnlyElement(inputProperties);

            return ActualProperties.builderFrom(properties)
                    .local(LocalProperties.grouped(node.getDistinctSymbols()))
                    .build();
        }