anchor.diff:  				true ->
   				    case TxId of
   					ignore ->
  -					    internal_store_ss(Key,{NewLastOp,Snapshot},CommitTime,OpsCache,SnapshotCache);
  +					    internal_store_ss(Key,{NewLastOp,Snapshot},CommitTime,OpsCache,SnapshotCache,ShouldGc);
   					_ ->
   					    materializer_vnode:store_ss(Key,{NewLastOp,Snapshot},CommitTime)
   				    end;
  
positive.code: 
  handle_command({store_ss, Key, Snapshot, CommitTime}, _Sender,
                 State = #state{ops_cache = OpsCache, snapshot_cache=SnapshotCache})->
      internal_store_ss(Key,Snapshot,CommitTime,OpsCache,SnapshotCache),
      {noreply, State};
  
  
  
negative.code: 
  
  -define(SNAPSHOT_THRESHOLD, 10).
  -define(SNAPSHOT_MIN, 3).
  -define(OPS_THRESHOLD, 50).
  
  -ifdef(TEST).
  