Attention Sets and gerrit query

[Partycatlol]

Hi!
I couldn't find anything on how to access the new Attention Sets feature from the gerrit query ssh API. I know about the 'attention:USER' filter, but I'd like to get all the users that are currently in the Attention Set for a particular change (similar to REST API https://gerrit-review.googlesource.com/Documentation/rest-api-changes.html#get-attention-set). Is there an undocumented option that would return that info?

Thanks!