does multi track animation support in ofAssimpModelLoader?

Hi, In my scene, I have a fbx model which make a human with two animations: "idle" and "mouse open", the human do idle animation looply, concurrently when the human need to speak, I start play the "mouse open" animation.

This is common reqirement in digital human business. In this situation, I think when mouse open animation playing, corresponding mouse skeleton is affect by only "mouse open" animation? I'm not sure for tech implement detail. In before I done this in 2d digital human app which used a library called spine2d, In which, have a freature called animation track, the deatil is here: https://esotericsoftware.com/spine-applying-animations. I think this can help me to illustration what I want.

So what I want to know Is: does the ofAssimpModelLoader addon support this feature? can you give me some advice about my question?

Start by reviewing the ofAssimpModelLoader addon and how it represents the two animations described in the issue. Determine whether concurrent, independently targeted animation tracks are supported; done should be a clear capability answer or a specifically scoped feature proposal.