How to get a third-party Flutter SDK working in Flutterflow.

Custom Code

Hi all, I'm pretty new to Flutterflow and Flutter and I want to build and use the Anyline SDK:
https://pub.dev/packages/anyline_plugin

I tried to get it working through a custom widget, but without any luck so far. App kept crashing.
So what I learned so far is that I could have more luck if I integrate it somehow outside Flutterflow. Therefore I pushed the app to Github and now I'm able to modify the code and everything.

I was wondering if anyone can give me some hints and best practices on how I could get this SDK working. Maybe a good youtube instruction video (with another SDK) would help already enough.

What have you tried so far?

Tried to get it working as Custom Widget in Flutterflow.
Looked for alternative solutions.
Learned how I could push it to guthub and build it myself with Xcode and Flutter

Did you check FlutterFlow's Documentation for this topic?
Yes
2