How could I create new sub processes in one existed sub process content ?

Hello team,

 I find this help JIRA from the jBPM docs guilder. I want to get help that how I can create new sub process in one existed sub process content.

 My oversight project is using this jBPM work flow and one case is that we can add approvers by other approvers during the request processing. Currently, jBPM will loop the initial approvers count to create the sub process then do relevant flow, then I want to know which api can be used to create another sub process in the existed sub process ?

 It will be much helpful if I can get help from your side, thanks a lot. 

 If possible, could you please send one notification to my email about the solutions ? Thanks a lot.

haizhen529@163.com