presto-main/src/main/java/io/prestosql/sql/planner/planprinter/PlanPrinter.java/PlanPrinter/visitValues
class PlanPrinter:        @Override
        public Void visitValues(ValuesNode node, Void context)
        {
            NodeRepresentation nodeOutput = addNode(node, "Values");
            for (List<Expression> row : node.getRows()) {
                nodeOutput.appendDetailsLine(row.stream()
                        .map(PlanPrinter::unresolveFunctions)
                        .map(Expression::toString)
                        .collect(joining(", ", "(", ")")));
            }
            return null;
        }