I had that, but i was thinking we could continue supporting NSNull for convenience since removing keys from super's dictionary is such a hassle.

I don't feel strongly about it, tho.

> On Oct 31, 2013, at 9:35 PM, Justin Spahr-Summers <notifications@github.com> wrote:
> 
> In Mantle/MTLJSONAdapter.h:
> 
> > @@ -19,9 +19,7 @@
> >  // Subclasses overriding this method should combine their values with those of
> >  // `super`.
> >  //
> > -// Any property keys not present in the dictionary are assumed to match the JSON
> > -// key that should be used. Any keys associated with NSNull will not participate
> > -// in JSON serialization.
> > +// Any keys associated with NSNull will not participate in JSON serialization.
> Shouldn't this be "any keys omitted" now? Explicit NSNull should be unnecessary.
> 
> —
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