what are the other ways to prevent a class from being subclassed. one way is to declare the class fi

[EJP]

I don't understand your benefit. With this convolution what the net
result Who do you include/exclude doing it both ways.

Even if that were true it is too weird and convoluted. Don't do it.

It is exactly as 'wierd and convoluted' as the 'private', 'protected',
'public', and default access control modifiers. People who have that
access can subclass, others can't.