Where is mir/raii.h?

I'm trying to compile a program on a Vivid (15.04) Ubuntu Touch device; and the only problem I have is:

fatal error: mir/raii.h: No such file or directory

The code does:

#include "mir/raii.h"

... and apparently, that file should have been in the libmircommon-dev, which I both have:

$ apt-show-versions -r mircommon
libmircommon-dev:armhf/vivid 0.20.3+15.04.20160322-0ubuntu1 uptodate
libmircommon5:armhf/vivid 0.20.3+15.04.20160322-0ubuntu1 uptodate

It's definitely not on the system, because I'm doing:

sudo find / -xdev -name raii.h

... and it returns nothing.

Now, in Ubuntu – Package Contents Search (trusty) -- raii.h, there is a /usr/include/mircommon/mir/raii.h in mircommon-dev.

However, already in the next version, Ubuntu – Package Contents Search (wily) -- raii.h, it is not anymore in mircommon-dev - there's just a file /usr/include/wibble/raii.h in libwibble-dev, which I think is unrelated (and same for all the next versions)

However, I can also see code like ~kdub/mir/key-repeat-gmock-fixes : files for revision 3419, with commits in 2016, which still uses #include "mir/raii.h"?

So my question is:

• Is mir/raii.h fully removed from Mir, or does it exist in a different package? If so which package should I install?
• If it has been removed completely, what header could I use instead to have the program compile?

EDIT: just looked at the apparently latest mir/development-branch/tarball r.3489 (via http://bazaar.launchpad.net/~mir-team/mir/development-branch/files), and there is still a

./mir/development-branch/src/include/common/mir/raii.h

there... the question is then, why isn't it in any of the Ubuntu packages?