Event that is fired whenever a document is being explicitly migrated.
| Name | Type | Description |
| DocumentObject | Document | Input Document object that is being migrated. |
| BeforeOrAfter | EventTimingEnum | Input EventTimingEnum indicating if the event is being fired before (kBefore) or after (kAfter) the document is migrated. |
| Context | NameValueMap | Input NameValueMap object that can be used to determine the context of why the event fired. No context information is provided for this event. |
| HandlingCode | HandlingCodeEnum | Output HandlingCodeEnum that indicates how you are handling the event. This argument is ignored for this event. |