--- /dev/null
+class Customer < Struct.new(:name, :id)
+ def to_param
+ id.to_s
+ end
+end
+
+class BadCustomer < Customer
+end
+
+class GoodCustomer < Customer
+end
+
+module Quiz
+ class Question < Struct.new(:name, :id)
+ def to_param
+ id.to_s
+ end
+ end
+end