code: protected void flushObject (DObject obj)
      {
          // move this object into the dead pool so that we don't claim to have it around anymore;
          // once our unsubscribe message is processed, it'll be 86ed
          int ooid = obj.getOid();
          _ocache.remove(ooid);
          _dead.put(ooid, obj);
  
          // ship off an unsubscribe message to the server; we'll remove the object from our table
          // when we get the unsub ack
          _comm.postMessage(new UnsubscribeRequest(ooid));
      }
docs: Flushes a distributed object subscription, issuing an unsubscribe request to the server.