How to hook Luis into a Bot Framework FormDialog

Question

I have a Dialog class which is a FormDialog (say, FormDialog< SandwichOrder>; one which builds an order for a sandwich, as per the bot framework documentation website). The S

Answer 1

This post: Custom fields with FormBuilder in the Microsoft Bot Framework appears to suggest an answer, and a way to implement your own custom field which implements IRecognizer. I haven't gotten it to work yet though.