Return stage-overview with tasks inside


I found the Api Rest for json representing stage-overview :


I’m wondering if there is a way to get the list of tasks inside each stage with same attributes :
“current”: false
“ended”: true,
To redraw the diagram of current situation of case.
As the rest API /diagram doesn’t highlight the steps (done, ongoing)…
Related to this need that I couldn’t find a way yet to retrieve all the tasks with their status from Rest API CMMN Instance Diagram - #2 by bballer09