parentGroup.addGroup(childGroup, DomainRegistry.groupMemberService());
childGroup.addUser(user);
assertEquals(1, parentGroup.groupMembers().size());
assertEquals(1, childGroup.groupMembers().size());
assertTrue(parentGroup.isMember(user, DomainRegistry.groupMemberService()));
assertTrue(childGroup.isMember(user, DomainRegistry.groupMemberService()));
ApplicationServiceRegistry
.identityApplicationService()