groner/blacklight — comment on commit efb31479c6055f8b44adf8b152c042060c8eb53e
File:  line 0
By jrochkind:

Ah wait, I see the problem, this is not an individual document export feature, it's a feature for your entire folder. And the problem is that some documents in your folder may support it, and others not. Hmm. Yeah, I don't think it's neccesarily right to hide the whole function if you have one document in your set that doesn't support it, good call cbeer.

Still have a question of what happens under current code in this situation, contemplating solutions.