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# revision(_:supportsConstellation:)

Returns a Boolean value that indicates whether a revision supports a constellation.

```
class func revision(_ requestRevision: Int, supportsConstellation constellation: VNRequestFaceLandmarksConstellation) -> Bool
```

## Parameters

`requestRevision`

The revision of the request.

`constellation`

The contellation for which to determine support.

## Return Value

<doc://com.apple.documentation/documentation/Swift/true> if the revision supports the constellation, otherwise <doc://com.apple.documentation/documentation/Swift/false>.

## Discussion

---

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