/usr/share/dbus-1/services/org.gnome.baobab.service is in baobab 3.18.1-1ubuntu1.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
1 2 3 | [D-BUS Service]
Name=org.gnome.baobab
Exec=/usr/bin/baobab --gapplication-service
|