group1Instance.addNestedGroup(group2DN);
group2Instance.addNestedGroup(group3DN);
//Add some members.
group1Instance.addMember(user1Entry);
group2Instance.addMember(user2Entry);
group3Instance.addMember(user3Entry);
group2Instance.addMember(user4Entry);
group3Instance.addMember(user5Entry);
//Check if group 3 shows up in the group 2 membership list.
MemberList memberList = group2Instance.getMembers();
boolean found=false;