Continued from
http://blog.lckymn.com/2009/05/17/roo-so-cool-03/
There are two other aspects which are Choice_Roo_Plural and Choice_Roo_ToString.
"Choice" in Plural Form, "Choices"
Choice_Roo_Plural declares that the Choice has a method named getPluralName() which returns a String type value, “Choices” which is the plural form of “Choice”. I don’t really get why it is necessary though. I first thought it might be the name
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