How to add users and roles in child team area using plain Java RTC API?

Question

Is it possible to add users and roles in child team area? My code currently can add users and roles in team areas but how can I add them in child team area.

ITeamArea TA = (ITeamArea)teamRepository.itemManager().fetchCompleteItem(newTAHandle,ItemManager.DEFAULT,monitor);
 IContributor contributor = teamRepository.contributorManager().fetchContributorByUserId(members,monitor);
 ArrayList roles  = getTeamRoleName(projectArea,member_roles);
 IProcessAreaWorkingCopy areaWc = (IProcessAreaWorkingCopy)service.getWorkingCopyManager().createPrivateWorkingCopy(TA);  
 areaWc.getTeam().addContributorsSettingRoleCast( new IContributor[] {contributor}, new IRole[] {roles})); 
 areaWc.save(null);

I was trying to find the hierarchy stuff, but then not finding the option of adding contributors to child team area.

IProjectArea workinCopyProjectArea = (IProjectArea) projectArea.getWorkingCopy();
            ITeamAreaHierarchy teamAreaHierarchy = (TeamAreaHierarchy) workinCopyProjectArea.getTeamAreaHierarchy();

Answer 1

That projectArea.getWorkingCopy(); was described as not working in this thread.

While this was:

ProjectAreaWorkingCopy wc = new ProjectAreaWorkingCopy(projectArea);
wc.addMembers(c);