How to know Series event changed or occurrence changed

I am using Microsoft graph Api and for event changes i am using delta query. My question is,
If i make changes to the full series event and one occurrence of the series event, how do we know if only one occurrence has changed or  if the full series has changed?
Because right now, by using Delta query, i am getting series master array and as well as all occurrences of the mater series.
Do we have any key or field in master series event that indicates that full series get updated?