How to get list of severities using Java API?

IProcessClientService processClient = 

	(IProcessClientService) repository.getClientLibrary(IProcessClientService.class);

URI uri = URI.create("My Project".replaceAll(" ", "%20"));

IProjectArea projectArea = 

	(IProjectArea) processClient.findProcessArea(uri, null, monitor);

IProjectAreaHandle projectAreaHandle = projectArea.getProjectArea();



IWorkItemClient workItemClient = 

	(IWorkItemClient) repository.getClientLibrary(IWorkItemClient.class);

IAttribute severityAttribtute = 

	workItemClient.findAttribute(projectAreaHandle, IWorkItem.SEVERITY_PROPERTY, monitor);

IEnumeration<? extends ILiteral> severities = 

	workItemClient.resolveEnumeration((IAttributeHandle) severityAttribtute.getItemHandle(), monitor);



ILiteral majorSeverity = null;

for(ILiteral severity : severities.getEnumerationLiterals()) {

	if(severity.getName().equals("Major")) {

		majorSeverity = severity;

		break;

	}

}



IWorkItem workItem = ...

IWorkItemWorkingCopyManager wcm = workItemClient.getWorkItemWorkingCopyManager();

wcm.connect((IWorkItemHandle) workItem.getItemHandle(), IWorkItem.FULL_PROFILE, monitor);

WorkItemWorkingCopy workingCopy = wcm.getWorkingCopy((IWorkItemHandle) workItem.getItemHandle());

IWorkItem workItemCopy = workingCopy.getWorkItem();

workItemCopy.setValue(severityAttribtute, majorSeverity.getIdentifier2().getStringIdentifier());

workingCopy.save(monitor);

Hello I would like to set the severity for my work item.

Here is my code:

      ITeamAreaHandle teamAreaHandle = Snippet3.createProject(repo, "Snippet 5");

        ITeamArea teamArea = (ITeamArea) repo.itemManager().fetchCompleteItem(teamAreaHandle, IItemManager.DEFAULT, monitor);

        IProjectAreaHandle projectArea = teamArea.getProjectArea();

        IWorkItemClient service = (IWorkItemClient) repo.getClientLibrary(IWorkItemClient.class);

        IWorkItemType workItemType = service.findWorkItemType(projectArea, "defect", monitor);

        IWorkItemHandle handle = service.getWorkItemWorkingCopyManager().connectNew(workItemType, monitor);

        WorkItemWorkingCopy wc = service.getWorkItemWorkingCopyManager().getWorkingCopy(handle);

        IWorkItem workItem = wc.getWorkItem();

            List<ICategory> findCategories= service.findCategories(projectArea, ICategory.FULL_PROFILE, monitor);

            ICategory category = findCategories.get(0);

            workItem.setCategory(category);

            workItem.setCreator(repo.loggedInContributor());

            workItem.setSeverity(arg0);

            IDetailedStatus s = wc.save(null);

But I have no idea how can I fetch list of severities available. Any ideas?