/usr/include/NetworkManagerQt/settings/ is in libnetworkmanagerqt-dev 0.9.8.2-1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/NetworkManagerQt/settings/adslsetting.h
/usr/include/NetworkManagerQt/settings/bluetoothsetting.h
/usr/include/NetworkManagerQt/settings/bondsetting.h
/usr/include/NetworkManagerQt/settings/bridgeportsetting.h
/usr/include/NetworkManagerQt/settings/bridgesetting.h
/usr/include/NetworkManagerQt/settings/cdmasetting.h
/usr/include/NetworkManagerQt/settings/connectionsettings.h
/usr/include/NetworkManagerQt/settings/gsmsetting.h
/usr/include/NetworkManagerQt/settings/infinibandsetting.h
/usr/include/NetworkManagerQt/settings/ipv4setting.h
/usr/include/NetworkManagerQt/settings/ipv6setting.h
/usr/include/NetworkManagerQt/settings/olpcmeshsetting.h
/usr/include/NetworkManagerQt/settings/pppoesetting.h
/usr/include/NetworkManagerQt/settings/pppsetting.h
/usr/include/NetworkManagerQt/settings/security8021xsetting.h
/usr/include/NetworkManagerQt/settings/serialsetting.h
/usr/include/NetworkManagerQt/settings/setting.h
/usr/include/NetworkManagerQt/settings/vlansetting.h
/usr/include/NetworkManagerQt/settings/vpnsetting.h
/usr/include/NetworkManagerQt/settings/wimaxsetting.h
/usr/include/NetworkManagerQt/settings/wiredsetting.h
/usr/include/NetworkManagerQt/settings/wirelesssecuritysetting.h
/usr/include/NetworkManagerQt/settings/wirelesssetting.h