/usr/include/libtomahawk/resolvers/ is in libtomahawk-dev 0.8.4+dfsg1-0ubuntu1.
This file is owned by root:root, with mode 0o755.
..
/usr/include/libtomahawk/resolvers/ExternalResolver.h
/usr/include/libtomahawk/resolvers/ExternalResolverGui.h
/usr/include/libtomahawk/resolvers/JSResolver.h
/usr/include/libtomahawk/resolvers/JSResolverHelper.h
/usr/include/libtomahawk/resolvers/JSResolver_p.h
/usr/include/libtomahawk/resolvers/Resolver.h
/usr/include/libtomahawk/resolvers/ScriptCollection.h
/usr/include/libtomahawk/resolvers/ScriptCommand.h
/usr/include/libtomahawk/resolvers/ScriptCommandQueue.h
/usr/include/libtomahawk/resolvers/ScriptCommand_AllAlbums.h
/usr/include/libtomahawk/resolvers/ScriptCommand_AllArtists.h
/usr/include/libtomahawk/resolvers/ScriptCommand_AllTracks.h
/usr/include/libtomahawk/resolvers/ScriptCommand_LookupUrl.h
/usr/include/libtomahawk/resolvers/ScriptCommand_LookupUrl_p.h
/usr/include/libtomahawk/resolvers/ScriptEngine.h
/usr/include/libtomahawk/resolvers/ScriptResolver.h