/// <summary>
/// Returns null, if incomplete ElementValuesCollection.
/// </summary>
/// <param name="dataList"></param>
/// <param name="elementValuesCollections"></param>
/// <returns></returns>
private ClientElementValueListItem[]? ElementValuesCallback(ClientElementValueList dataList, ElementValuesCollection elementValuesCollections)
{
ClientElementValueListItem[]? changedListItems = dataList.OnElementValuesCallback(elementValuesCollections);
if (changedListItems is not null && changedListItems.Length > 0)
{
List <ValueStatusTimestamp> changedValuesList = new List <ValueStatusTimestamp>(changedListItems.Length);
foreach (ClientElementValueListItem changedListItem in changedListItems)
{
changedValuesList.Add(changedListItem.ValueStatusTimestamp);
}
dataList.RaiseElementValuesCallbackEvent(changedListItems, changedValuesList.ToArray());
}
return(changedListItems);
}
