Bad implementation of Status error checking

[Paul J. Lucas]

What if I want to make up my own Status codes?  The isSuccess() and  
is*Error() methods do explicit code checks.  Why?  Why isn't the  
implementation for, say, isSuccess() this:

        return code >= 200 && code < 300;
?

- Paul

P.S.: And the boolean 'result' variable is so unnecessary.