How to get components for training dataset (fitted values)?

Hi there,
I'm new to Prophet and learning Prophet recently. I have checked docs, paper and source code, but I couldn't find a way to get trend, seasonality components for training dataset. Is there a way to get aforementioned values or Am I missing something?

The reason to get these components is to better understand how model works, better evaluate modeling process.

It would be nice to get trend, seasonality and other components for training set. Also growth rates at each change points (if possible).

Really appreciate your time and help!