I helped others in this post and also I used this solution to extend elements.
of course, in xml I need this :
<?xml encoding="utf-8"?>
<bpmn:MobileTask>
... [Mobile task extension element like user task]
</bpmn:MobileTask>
note : a simple and clear question
_How to create task element like user task or service task or send task or receive task with custom icon and other global properties like businessObject, id, name and etc…
Just, I need a sample json/xml/…
_
I hope can describe my problem.