/usr/lib/x86_64-linux-gnu/libitl_gobject.so is in libitl-gobject-dev 0.3-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/x86_64-linux-gnu/libitl_gobject.so.0.1.2
/usr/lib/x86_64-linux-gnu/libitl_gobject.so.0.1.2