Publish a message into given Pub/Sub topic when DlpJob has completed.
The message contains a single field, DlpJobName, which is equal to
the finished job’s `DlpJob.name
</dlp/docs/reference/rest/v2/projects.dlpJobs#DlpJob>`__. Compatible
with: Inspect, Risk
.. attribute:: topic
Cloud Pub/Sub topic to send notifications to. The topic must
have given publishing access rights to the DLP API service
account executing the long running DlpJob sending the
notifications. Format is projects/{project}/topics/{topic}.