/usr/ is in libedata-cal1.2-dev 3.28.1-1ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/
/usr/include/evolution-data-server/
/usr/include/evolution-data-server/libedata-cal/
/usr/include/evolution-data-server/libedata-cal/e-cal-backend-cache.h
/usr/include/evolution-data-server/libedata-cal/e-cal-backend-factory.h
/usr/include/evolution-data-server/libedata-cal/e-cal-backend-intervaltree.h
/usr/include/evolution-data-server/libedata-cal/e-cal-backend-sexp.h
/usr/include/evolution-data-server/libedata-cal/e-cal-backend-store.h
/usr/include/evolution-data-server/libedata-cal/e-cal-backend-sync.h
/usr/include/evolution-data-server/libedata-cal/e-cal-backend-util.h
/usr/include/evolution-data-server/libedata-cal/e-cal-backend.h
/usr/include/evolution-data-server/libedata-cal/e-cal-cache.h
/usr/include/evolution-data-server/libedata-cal/e-cal-meta-backend.h
/usr/include/evolution-data-server/libedata-cal/e-data-cal-factory.h
/usr/include/evolution-data-server/libedata-cal/e-data-cal-view.h
/usr/include/evolution-data-server/libedata-cal/e-data-cal.h
/usr/include/evolution-data-server/libedata-cal/e-subprocess-cal-factory.h
/usr/include/evolution-data-server/libedata-cal/libedata-cal.h
/usr/lib/
/usr/lib/x86_64-linux-gnu/
/usr/lib/x86_64-linux-gnu/pkgconfig/
/usr/lib/x86_64-linux-gnu/pkgconfig/libedata-cal-1.2.pc
/usr/share/
/usr/share/doc/
/usr/share/doc/libedata-cal1.2-dev/
/usr/share/doc/libedata-cal1.2-dev/copyright
/usr/lib/x86_64-linux-gnu/libedata-cal-1.2.so
/usr/share/doc/libedata-cal1.2-dev/changelog.Debian.gz