Make DRW an option instead of raw pointer
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I found a much better solution to this. |
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With the reassurance of the new testing changes, this PR starts to remove some of the unsafe in the code base, starting with converting the global
DRWcontext from a raw pointer to anOption<Drw>. It's obviously annoying to have tounwrap(orlet else) all over the place, but this accurately captures the semantics of all theis_nullchecks in the unsafe case.