/usr/include/liboobs-1.0/ is in liboobs-1-dev 3.0.0-2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/liboobs-1.0/oobs/
/usr/include/liboobs-1.0/oobs/oobs-defines.h
/usr/include/liboobs-1.0/oobs/oobs-enum-types.h
/usr/include/liboobs-1.0/oobs/oobs-error.h
/usr/include/liboobs-1.0/oobs/oobs-group.h
/usr/include/liboobs-1.0/oobs/oobs-groupsconfig.h
/usr/include/liboobs-1.0/oobs/oobs-hostsconfig.h
/usr/include/liboobs-1.0/oobs/oobs-iface-ethernet.h
/usr/include/liboobs-1.0/oobs/oobs-iface-irlan.h
/usr/include/liboobs-1.0/oobs/oobs-iface-plip.h
/usr/include/liboobs-1.0/oobs/oobs-iface-ppp.h
/usr/include/liboobs-1.0/oobs/oobs-iface-wireless.h
/usr/include/liboobs-1.0/oobs/oobs-iface.h
/usr/include/liboobs-1.0/oobs/oobs-ifacesconfig.h
/usr/include/liboobs-1.0/oobs/oobs-list.h
/usr/include/liboobs-1.0/oobs/oobs-nfsconfig.h
/usr/include/liboobs-1.0/oobs/oobs-ntpconfig.h
/usr/include/liboobs-1.0/oobs/oobs-ntpserver.h
/usr/include/liboobs-1.0/oobs/oobs-object.h
/usr/include/liboobs-1.0/oobs/oobs-result.h
/usr/include/liboobs-1.0/oobs/oobs-selfconfig.h
/usr/include/liboobs-1.0/oobs/oobs-service.h
/usr/include/liboobs-1.0/oobs/oobs-servicesconfig.h
/usr/include/liboobs-1.0/oobs/oobs-session.h
/usr/include/liboobs-1.0/oobs/oobs-share-nfs.h
/usr/include/liboobs-1.0/oobs/oobs-share-smb.h
/usr/include/liboobs-1.0/oobs/oobs-share.h
/usr/include/liboobs-1.0/oobs/oobs-smbconfig.h
/usr/include/liboobs-1.0/oobs/oobs-statichost.h
/usr/include/liboobs-1.0/oobs/oobs-timeconfig.h
/usr/include/liboobs-1.0/oobs/oobs-user.h
/usr/include/liboobs-1.0/oobs/oobs-usersconfig.h
/usr/include/liboobs-1.0/oobs/oobs.h