No "issuers" attribute for the annotation ApiClass #178

Hello, in the documentation about multiclass APIs it's said that "while all properties in the Api annotation must match for all classes in an API, you can additionally use the ApiClass annotation to provide properties that do not need to be exactly the same between classes".
Now, there's no "issuers" attribute for the annotation ApiClass. Is the "issuers" attribute supposed to be used with Api annotation only? What if we have a multiclass API and we need to specify issuers for one class only? Thank you.