/usr/lib/glib2.0/installed-tests/glib/libgdbus-example-objectmanager.so is in libglib2.0-tests 2.48.0-1ubuntu4.
This file is owned by root:root, with mode 0o777.
It is a symlink to /usr/lib/glib2.0/installed-tests/glib/libgdbus-example-objectmanager.so.0.0.0