How can you find topics that have no subscriptions?

PubSub+ Event Broker
1

A publisher can be producing events on a topic that have no interested consumers.
Is there a way to list those topics for the purposes of clean-up or decommission of unused flows?
This condition would also be causing the client counter Ingress Discard - No Subscription Match to increment.

2

The broker maintains an in-memory rolling log of these topics, at a maximum of 1000 entries.
This log can be viewed within the CLI with the following command:

show log no-subscription-match > show log no-subscription-match message-vpn myVPN >
This same command can also be issued over SEMPv1 with the following request XML:

  
    
      
        myVPN
      
    
  

A curl example would be like so:
curl -d @get-no-subscription-match.xml -u user:pass  https://broker-hostname:943/SEMP
where the file get-no-subscription-match.xml > contains the above request XML.
The response contains an entry for the published topic each time it was published to, along with details of the client-name and client-username.

 
  
   
    
     
      solclientjs/chrome-98.0.4758-Windows-0.0.0/3560415772/0001
      solace-cloud-client
      myVPN
      testing/no-sub/match
     
     
      solclientjs/chrome-98.0.4758-Windows-0.0.0/3560415772/0001
      solace-cloud-client
      my VPN >
      testing/no-sub/match