Where can i find ui-rest-api docs?

I want to implement my own Modeler, so I need to use the Flowable Modeler API.
Where can i find the documents?

I’m not sure how helpful this will be, but the old modeler rest classes can be found here:
flowable-engine/modules/flowable-ui/flowable-ui-modeler-rest/src/main/java/org/flowable/ui/modeler/rest at flowable-6.7.2 · flowable/flowable-engine · GitHub

These are not documented.