/usr/lib/libPantomime.so.1.2.2 is in libpantomime1.2 1.2.2+dfsg1-1build1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/GNUstep/Frameworks/Pantomime.framework/Versions/1.2/libPantomime.so.1.2.2