Question How to bind popup text fields to serialized properties

I am creating a PopupField<MyItemType> and using the formatListItemCallback and formatSelectedValueCallback callbacks to format the string from MyItemType.

How do I bind the text of the popup text element to the instance of MyItemType properly? As when I change a field in MyItemType the popup doesn't update.

I feel like I want something similar to the bindItem callbacks on the ListView, where I can manually bind the actual popup item to the data, rather than running the format selected value callbacks.