This library uses kotlin-reflect in the Walker in order to recursively get properties from each class as well as the class names. This functionality can be replaced with kotlinx-serialization functionality fairly easily. I have a branch that does exactly this. Can develop this further if there is an ask.
https://github.com/deusaquilus/pprint-kotlin/tree/using-kotlinx-serialization

Screenshot from 2023年12月31日 03-13-49