How to get the links from a specific state of the work item ?

Hello All,

I am trying to fetch changeset links present in a work item for all its states. For E.g. say I have added a changeset link to a work item 123 when it is in IN PROGRESS state and say I add one more changeset to the same work item when it is in Closed state.

I am retrieving all the work item states through its history. Something like below:

 IItemManager itm = teamRepository.itemManager();
            List history = itm.fetchAllStateHandles((IAuditableHandle) workItem.getStateHandle(), monitor);
           
            for (int i = history.size() - 1; i >= 0; i--)
            {
                IAuditableHandle audit = (IAuditableHandle) history.get(i);
               // Below line fetches me different states of the work item one by one through its history.
                IWorkItem workItemPrevious = (IWorkItem) teamRepository.itemManager().fetchCompleteState(audit, null);
            }

What I am trying to achieve :
For each state of the work item I am trying to fetch its changeset links. In the above E.g. for work item 123,
It should give output as:
IN PROGRESS : 1 changeset (I store its UUID)
Closed : 2 changesets

But for whichever state I try to access a work items changeset links, it always give me the same results. It gives the latest changeset links for all the states.

I use below code to fetch a work item's changeset links:

 final IWorkItemCommon workItemCommon = (IWorkItemCommon) iTeamRepository
                .getClientLibrary(IWorkItemCommon.class);
        final IWorkItemReferences references = workItemCommon.resolveWorkItemReferences(workItem, iProgressMonitor);
        final List<IEndPointDescriptor> refTypes = references.getTypes();

        final List<IChangeSet> changeSets = new ArrayList<IChangeSet>();

        for (final IEndPointDescriptor endPointDescriptor : refTypes)
        {

            if (endPointDescriptor.getLinkType()
                    .equals(ILinkTypeRegistry.INSTANCE.getLinkType(WorkItemLinkTypes.CHANGE_SET)))
            {

                final List<IReference> refList = references.getReferences(endPointDescriptor);
                for (final IReference reference : refList)
                {
                    final IChangeSetHandle csh = (IChangeSetHandle) reference.resolve();

                    final IChangeSet changeSet = (IChangeSet) iTeamRepository.itemManager()
                            .fetchCompleteItem(csh, IItemManager.DEFAULT, iProgressMonitor);
                    if (changeSet != null)
                    {
                       
                        changeSets.add(changeSet);

                    }

                }
            }
        }

Can someone help me here ?