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[plt-scheme] MzLib's class.ss

From: Taylor Campbell (campbell at evdev.ath.cx)
Date: Sun Jan 19 15:58:08 EST 2003		 
Is it possible to override a method, and in the overrided method's body 
apply
the original method?

i.e., in Objective-C, for example, you could do:

- (id)myMethod:(id)arg
{
    return [super myMethod:[arg foo]];
}

Also, how can I get the class of an object?
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