Caché Class Definition Reference
Final
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Specifies whether this class is final (cannot have subclasses).
Usage
To specify that a class is final, use the following syntax:
Class MyApp.Exam As %Persistent [ Final ] 
{
//class members
}
Otherwise, omit this keyword or place the word Not immediately before the keyword.
Details
If a class is final, it cannot have subclasses.
Also, if a class is final, the class compiler may take advantage of certain code generation optimizations (related to the fact that instances of a final class cannot be used polymorphically).
Default
If you omit this keyword, the class definition is not final.
See Also