Code review comment for lp:~alan-griffiths/mir/first-pass-of-surface-spec-modification

> There is no way for a client to get a meaningful response to a change spec
> request. It is "fire and forget". There will likely be corresponding events
> from the server - but even if the request is honored in full the surface may
> never be in the requested state because of concurrent changes by (e.g.) the
> user.

This was discussed to death in lp:~vanvugt/mir/wait-result/+merge/252403