This is a coding example working on IRIS 2020.2 It will not be kept in sync with new versions It is also NOT serviced by InterSystems Support !
This is a sample to use %JSON.Adaptor class available in IRIS to produce a snapshot of your object.
The sample consists of 2 classes that are variations of what was known in Caché/SAMPLES as Sample.Person. Be aware that the possibilities are limited by %JSON.Adapter and how you make use of it.
Once in place you create some test data by Populate().
You select an object and take a snapshot. You apply changes to your object take another snapshot. And see the difference.