/usr/share/dbus-1/services/unity-scope-picasa.service is in unity-lens-photos 1.0+17.10.20170605-0ubuntu3.
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=com.canonical.Unity.Scope.Photos.Picasa
Exec=/usr/share/unity-scopes/picasa/unity_picasa_daemon.py
|