Martin Hořeňovský 4f09f1120b
Make IStream::stream non-const
This way it makes much more sense from logically-const point
of view, and also means that concrete implementations don't
have to always have a `mutable` keyword on the stream member.
2022-04-13 14:59:39 +02:00
..
2022-04-13 14:59:39 +02:00