Can I check if I've deleted all rows in a Level 1 scroll in my Component Interface?

Hi. I'm processing various types of transactions on a room in a CI, in an app engine peoplecode.  I don't want to Save until I've done all kinds of edit checks.

One of the edit checks involves checking if a deptid changed and all rows in the CI buffer for another table should then be empty.

In the same session, the user could have deleted the rows in that 2nd table, and also changed the Deptid.

I'm having trouble determining IF those rows are actually deleted in the Buffer. 

I don't do the SAVE until I'm done with the whole room's transactions... so How do i check if the Buffer has a Level 1 row still or not?