/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/ is in python3-plainbox 0.25-1.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/bin/
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/bin/stub_package_list
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/data/
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/data/all-bytes
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/data/qml-navigation.qml
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/data/qml-simple.qml
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/manage.py
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/po/
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/po/POTFILES.in
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/po/de.po
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/po/en_GB.po
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/po/pl.po
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/po/plainbox-provider-stubbox.pot
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/po/pt.po
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/po/ug.po
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/po/zh_TW.po
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/units/
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/units/jobs/
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/units/jobs/categories.pxu
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/units/jobs/local.pxu
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/units/jobs/multilevel.pxu
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/units/jobs/representative.pxu
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/units/jobs/stub.pxu
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/units/jobs/win.pxu
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/units/testplans/
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/units/testplans/all.pxu
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/whitelists/
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/whitelists/stub.whitelist
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/whitelists/stub1.whitelist
/usr/lib/python3/dist-packages/plainbox/impl/providers/stubbox/whitelists/stub2.whitelist