Whether a worksession reference model is being attached or detached.
Enum values
| Name | Value | Description |
|---|---|---|
| Attached | 0 | A worksession reference model has just been attached. |
| Detached | 1 | A worksession reference model has just been detached. |
| BeforeDetach | 2 | A worksession reference model is about to be detached. The doc still contains the reference content at this point, so subscribers can identify what will be affected before it's purged. |