Documenting the generated methods copyWith and toJson

[rekire]

I'm finishing my first flutter plugin where I am using freezed for some data classes. My problem is just that pub.dev marks that I did't document the copyWith and toJson methods. I would like to do that without modifying the generated files.

I would like to see that this part is auto generated or that you give me an option to set that e.g. in a annotation.

[rrousselGit]

Fancy making a PR? This should just be about adding docs directly in the generated code.

[rekire]

What do you prefer? Just generating the comment is good enough for me. I'll try to find the relevant code now