/usr/include/ is in libibus-qt-dev 1.3.3-1build2.
This file is owned by root:root, with mode 0o755.
..
/usr/include/ibus-qt/
/usr/include/ibus-qt/qibusattribute.h
/usr/include/ibus-qt/qibusattrlist.h
/usr/include/ibus-qt/qibusbus.h
/usr/include/ibus-qt/qibuscomponent.h
/usr/include/ibus-qt/qibusconfig.h
/usr/include/ibus-qt/qibusconfigadaptor.h
/usr/include/ibus-qt/qibusconfigproxy.h
/usr/include/ibus-qt/qibusconfigservice.h
/usr/include/ibus-qt/qibusdbusproxy.h
/usr/include/ibus-qt/qibusengine.h
/usr/include/ibus-qt/qibusengineadaptor.h
/usr/include/ibus-qt/qibusenginedesc.h
/usr/include/ibus-qt/qibusenginefactory.h
/usr/include/ibus-qt/qibusfactoryadaptor.h
/usr/include/ibus-qt/qibusibusproxy.h
/usr/include/ibus-qt/qibusinputcontext.h
/usr/include/ibus-qt/qibusinputcontextproxy.h
/usr/include/ibus-qt/qibuslookuptable.h
/usr/include/ibus-qt/qibusobject.h
/usr/include/ibus-qt/qibusobservedpath.h
/usr/include/ibus-qt/qibusproperty.h
/usr/include/ibus-qt/qibusproplist.h
/usr/include/ibus-qt/qibusserializable.h
/usr/include/ibus-qt/qibustext.h