/usr/include/KF5/Akonadi/Calendar/FreeBusyProviderBase is in libkf5akonadicalendar-dev 4:15.12.3-0ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 | #include "akonadi/calendar/freebusyproviderbase.h"
|