Retrieve a query value into a variable

Hi experts!

In the code below, I want to list in a browser, the Inbox names and the quantity of objects next to each.

While the function InfoObjectInbox.getTittle() gets me the name (SI_NAME) I do not find one that can get me the quantity (SI_CHILDREN), perhaps into the line: int aInt = ??????;

How can I achieve this?

Thank you.