private static IAGLink4 VerifyConnectivity(AgLinkPlc plc, ICollection <IPlcItem> plcItems, PlcItemUsageType usageType)
{
var underlyingPlc = plc.UnderlyingPlc;
if (underlyingPlc is null)
{
var itemDescriptions = Plc.GetPlcItemDescription(plcItems);
throw new NotConnectedPlcException($"Cannot {usageType.ToString().ToLower()} the plc items ({itemDescriptions}) because {plc:LOG} is not connected. All items will be put on hold.");
}
return(underlyingPlc);
}
