presto-main/src/main/java/io/prestosql/sql/planner/optimizations/UnaliasSymbolReferences.java/Rewriter/visitRowNumber
class Rewriter:        @Override
        public PlanNode visitRowNumber(RowNumberNode node, RewriteContext<Void> context)
        {
            return new RowNumberNode(node.getId(), context.rewrite(node.getSource()), canonicalizeAndDistinct(node.getPartitionBy()), canonicalize(node.getRowNumberSymbol()), node.getMaxRowCountPerPartition(), canonicalize(node.getHashSymbol()));
        }