public interface INodeEventSource| CancellationToken | Signaled when the node has been cancelled. |
| ItemProcessingEventData | Item currently being processed. |
| RaiseProgressEvent | Raises a progress event for the item currently being processed (available in ItemProcessingEventData). RaiseProgressEvent(NullableInt64, NullableInt64, NullableSingle) for details. |
| RaiseTraceEvent | Raises a trace event. [!:NodeShell.RaiseTraceEvent(Schemas.Core.Eventing.OperationalEvent, EventTarget)] for details. |