Added in MplusKASSA v11.3.0
Explanation of the event
The cancelExternalPayment event occurs when no response was given to the requestCancelExternalPayment.
The cancelExternalPayment event is step four in a multi-step flow that involves the following events: (1) startExternalPayment, (2) pollExternalPayment, (3) requestCancelExternalPayment and (4) cancelExternalPayment.