[Nitro] Architectural question

[Judson Lester]

So here's an upsetting little bug I stumbled across recently:

I've got model_object = ModelClass[1], right?
And elsewhere (different thread, process, different menthod, even),
someone deletes ModelClass[1].

If I model_object.reload I get a NoMethodError about nil, which is
less than informative.

I'd like for reloading a missing object to raise a useful exception,
but AFAICT, Og doesn't define an exception class.  Any problems with
me starting the Og::Exception heirarchy?

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