> Are you sure the 'filter' must be a method of the object itself? That 
> is, you are limited to methods which exist in Object and Fixnum?
> 
> (unlike, say, Liquid filters, which are defined as methods which take 
> the object as the first argument)

Currently, it does have to be a method of the object itself.  But it 
appears that may be to limiting.  It osunds like Liquid filters amy be 
what I need.  Where can I get more info on those?
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