Add button on WS to collapse/expand all threads

Summary:

Add button on WS to collapse/expand all threads

Content (required):

Hi,

We would like to add a button on the WS to allow users to expand or collapse all threads of an incident.

I didn't find documentation in the ithread or note objects in the BUI framework. Is something like this possible?

see attached screenshot

Thanks

Version (include the version you are using, if applicable):

21B

Code Snippet (add any code snippets that support your topic, if applicable):