Query about outdated Unity Sample

I am trying to adapt some code in the Unity sample in this project in my own project (targeting Meta Quest 2) and using my own models from here: https://github.com/dotnet/machinelearning-samples/blob/main/samples/csharp/end-to-end-apps/Unity-HelloMLNET/HelloMLNET/Assets/Scenes/HelloML.cs

However, it seems that the `ArrayDataViewBuilder` class is now an internal sealed class, and it cannot be accessed by external classes. This was documented as a workaround for `PredictionEngine` since it made use of `Reflection.Emit` which apparently "throws up": https://github.com/dotnet/machinelearning-samples/tree/main/samples/csharp/end-to-end-apps/Unity-HelloMLNET#known-workarounds

What is a solution for this? I am in a position where I absolutely need a solution to this in the next 72 hours.