presto-main/src/main/java/io/prestosql/sql/planner/planprinter/PlanPrinter.java/PlanPrinter/visitIntersect
class PlanPrinter:        @Override
        public Void visitIntersect(IntersectNode node, Void context)
        {
            addNode(node, "Intersect");

            return processChildren(node, context);
        }