+ puts <<~CONFIG
+ graph_args --lower-limit 0
+ graph_category passenger
+ graph_title Passenger queues
+ graph_vlabel count
+
+ global.label global
+ global.draw AREA
+ CONFIG
+
+ groups = passenger_status.get_elements("//supergroup").map do |supergroup|
+ supergroup.text("name")
+ end
+
+ groups.sort.each do |name|
+ puts "#{name}.label #{name}"
+ puts "#{name}.draw STACK"
+ end