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# entityID

An identifier for the entity this face belongs to.

```
let entityID: FaceGroupAnalyzer.Entity.ID?
```

## Discussion

This value is `nil` until you call
[`update(subprogress:)`](/documentation/MediaIntelligence/FaceGroupAnalyzer/update(subprogress:)). After clustering
runs, every face receives an entity identifier that groups it
with other faces of the same person.

---

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