/usr/include/idzebra-2.0/idzebra/ is in libidzebra-2.0-dev 2.0.59-1+b2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/idzebra-2.0/idzebra/api.h
/usr/include/idzebra-2.0/idzebra/bfile.h
/usr/include/idzebra-2.0/idzebra/data1.h
/usr/include/idzebra-2.0/idzebra/dict.h
/usr/include/idzebra-2.0/idzebra/flock.h
/usr/include/idzebra-2.0/idzebra/isam-codec.h
/usr/include/idzebra-2.0/idzebra/isamb.h
/usr/include/idzebra-2.0/idzebra/isamc.h
/usr/include/idzebra-2.0/idzebra/isams.h
/usr/include/idzebra-2.0/idzebra/recctrl.h
/usr/include/idzebra-2.0/idzebra/recgrs.h
/usr/include/idzebra-2.0/idzebra/res.h
/usr/include/idzebra-2.0/idzebra/snippet.h
/usr/include/idzebra-2.0/idzebra/util.h
/usr/include/idzebra-2.0/idzebra/version.h