Decorator imports as unused variables

[nazmariam]

We have an issue with decorators, decorator imports and also variables that used in decorators are marked as unused:

[nazmariam]

I suspect that it was made in 61cbe3b

[nazmariam]

@wallwhite could you take a look, please?

[okovpashko]

Moreover, there's an error with the decorated class as well saying that the exported class is an unused variable 😒