void processMap(OMMMap symbolList)
    {
        if (_itemManager == null)
            _itemManager = new SymbolListItemManager(_appContext, _serviceName, _msgModelType,
                    symbolList.getTotalCountHint());
        for (Iterator<?> iter = symbolList.iterator(); iter.hasNext();)
        {
            OMMMapEntry item = (OMMMapEntry)iter.next();
            String itemName = item.getKey().toString();
            switch (item.getAction())
            {
                case OMMMapEntry.Action.ADD:
                    add(itemName);
                    break;
                case OMMMapEntry.Action.UPDATE:
                    // ignore updates
                    break;
                case OMMMapEntry.Action.DELETE:
                    delete(itemName);
                    break;
            }
        }
    }