Availability of CMMN ReST API


I installed the all-in-one docker and I can see there is a CMMN ReST API endpoint - am I right in saying, though, that it is not available/stable? Or is it simply not documented?

There’s a project (flowable-cmmn-rest) in the source code containing the ReST API code - but not sure how complete/tested this is?

Does anyone have a swagger for this?