presto-main/src/main/java/io/prestosql/sql/planner/planprinter/PlanPrinter.java/Visitor/visitLimit
class Visitor:        @Override
        public Void visitLimit(LimitNode node, Void context)
        {
            addNode(node,
                    format("Limit%s", node.isPartial() ? "Partial" : ""),
                    format("[%s%s]", node.getCount(), node.isWithTies() ? "+ties" : ""));
            return processChildren(node, context);
        }