The name mimewritable stems from the output function being called writemime. Now that writemime has been renamed to show, maybe mimewritable should be renamed to mimeshowable or similar. Not sure what the best name is here.
mimeshowable seems fine to me. Not the catchiest name, but this is a bit of a niche API.
Since this refers to the show function, maybe just showable?
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Since this refers to the
showfunction, maybe justshowable?