Source Code needed for default visual area chart

Hi *,

i am searching for the default area chart sources which can be added througout the default PowerBI installation. But i couldnt find it on GitHub. 

I need to make a modification on this visual but dont want to reqrite such a visual on for adding 2 minimal enhancements. Therefore my question:

Is there a way to grab the source of this visual from somewhere to modify and re-package it ?

best regards

Yavuz