attributes was leave only callback.

[soranoba]

please see #151

[eproxus]

Hmm, as you pointed out earlier, there are plenty of attributes that needs to be included. Some code will also rely on some attributes existing, so this is probably a bad idea.

[soranoba]

I see.
I will close this pr.
Thanks for everything.

[eproxus]

I'm all open for better ideas on how to solve this though. I think most attributes won't produce any compiler errors, so maybe the manual approach is the best after all.