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