Process Engine - Call Activity, Throwing and catching events - imbedding variables

Hey all -

I need help on the call activity, as well as the throwing and catching message. Just downloaded the github examples - I will start trolling through them all now. Any tips on where to go to get them working through the Flowable Apps while I troll the examples?

Any training materials, use cases, guides, videos - anything - really welcomed!!

a.

Here’s some simple tests for the call activity: https://github.com/flowable/flowable-engine/blob/master/modules/flowable-engine/src/test/java/org/flowable/examples/bpmn/callactivity/CallActivityTest.java, example models here: https://github.com/flowable/flowable-engine/tree/master/modules/flowable-engine/src/test/resources/org/flowable/engine/test/bpmn/callactivity

Docs on the call activity can be found here: https://flowable.com/open-source/docs/bpmn/ch07b-BPMN-Constructs/#sub-processes-and-call-activities