/usr/ is in librest-extras-dev 0.7.12-1ubuntu2.
This file is owned by root:root, with mode 0o755.
..
/usr/lib/pkgconfig/
/usr/include/
/usr/include/rest-0.7/
/usr/include/rest-0.7/rest-extras/
/usr/include/rest-0.7/rest-extras/flickr-proxy.h
/usr/include/rest-0.7/rest-extras/flickr-proxy-call.h
/usr/include/rest-0.7/rest-extras/lastfm-proxy.h
/usr/include/rest-0.7/rest-extras/lastfm-proxy-call.h
/usr/include/rest-0.7/rest-extras/youtube-proxy.h
/usr/lib/
/usr/lib/pkgconfig/rest-extras-0.7.pc
/usr/share/
/usr/share/gir-1.0/
/usr/share/gir-1.0/RestExtras-0.7.gir
/usr/share/doc/
/usr/share/doc/librest-extras-dev/
/usr/share/doc/librest-extras-dev/copyright
/usr/lib/librest-extras-0.7.so
/usr/share/doc/librest-extras-dev/changelog.Debian.gz