We need an internal keyword.

[Basile B.]

On Monday, 22 October 2018 at 08:25:17 UTC, Andrea Fontana wrote:
> Moreover: you're the author of the module so you're supposed to 
> know how it works and which members you should call or not.

- team
- maintainer of a module written by someone that works elsewhere 
now.

that's two cases where strict privacy can be optionally a thing 
avoiding wrong usage of private members within the scope of a 
module.