/usr/include/udisks2/ is in libudisks2-dev 2.7.6-3ubuntu0.2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/udisks2/udisks/
/usr/include/udisks2/udisks/udisks-generated.h
/usr/include/udisks2/udisks/udisks.h
/usr/include/udisks2/udisks/udisksclient.h
/usr/include/udisks2/udisks/udisksenums.h
/usr/include/udisks2/udisks/udisksenumtypes.h
/usr/include/udisks2/udisks/udiskserror.h
/usr/include/udisks2/udisks/udisksmoduleiface.h
/usr/include/udisks2/udisks/udisksmoduleifacetypes.h
/usr/include/udisks2/udisks/udisksmoduleobject.h
/usr/include/udisks2/udisks/udisksobjectinfo.h
/usr/include/udisks2/udisks/udiskstypes.h
/usr/include/udisks2/udisks/udisksversion.h