/usr/lib/libtopmenu-client-gtk3.so is in libtopmenu-client-gtk3-dev 0.3-1.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/libtopmenu-client-gtk3.so.0.0.0
/usr/lib/libtopmenu-client-gtk3.so.0.0.0