How future regressor coefficient and events effect are estimated?

[ianux22]

Hello Everyone!

first of all, thanks for the job done on this fantastic project! I'm in love with it!

I was reading the original paper, and I was wondering how the events/holidays effect and the future regressors coefficient is estimated.
In the document, it is briefly mentioned that those are trainable coefficients. How are those estimated more in details?

If I can have a high level description and the related piece of code that would be great!