One is technically defined as a constant pointer, the other not;
you could use this to define 2 different class methods with the
same name but differing in "constness", and detect mutability that
way.
That fails in the case where, for example, some function returns a
CFStringRef that is really a CFMutableStringRef.
If the routine meant to return a mutable string, it should return a
mutable string. Otherwise you will have to make a mutable copy of
the string and use that.
Scott
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