Access the person's absences through the When and Why object

Summary:

Hello everyone, the question is very simple, I need to validate on the when and why screen if the person is absent on the dismissal date. If it does, it will give an error message, the problem is that I am not able to access the absence object, is it possible?

Version (include the version you are using, if applicable):

24D (11.13.24.10.0)