How can you add a 'message start event' to a toolbox


I want to add a ‘message start event’ to the toolbar…

So the ‘start event’ should immediately have the as a child entry and there should be a ‘message start event’ Icon in the toolbar.

How could you do that?


What have you done already to achieve this? Have you made yourself familiar with the code already? The bpmn-js palette provider is a good starting point.