There are 2 AddressBooks 'ABook1' and 'ABook2'. Both the AddressBooks have Group named 'Group1' and AddressBook 'ABook2' had a another group 'Group2' which has 'Group1' (from 'ABook1') as one of the members. How can i get to know that which Addressbook is 'Group1' belongs inside the 'Group2' thru the Object API.