import abstract_collection
+fun maybe: Bool do return true
+
var a = new Container[Int](1)
1.output
for i in a do
for j in a do
3.output
for k in a do end label l3
+ if maybe then
#alt1#break label l2
#alt2#break label l3
#alt3#break label l4
#alt4#break
#alt5#continue label l1
- break label l1
+ end
+ if maybe then break label l1
4.output
end label l2#!alt6#
#alt6#end label l1