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# SpatialTrackingSession.UnavailableCapabilities

A type that contains the unavailable capabilities of the current spatial tracking session.

```
struct UnavailableCapabilities
```

## Topics

### Initializers

[`init()`](/documentation/RealityKit/SpatialTrackingSession/UnavailableCapabilities/init())

Creates an unavailable capabilities instance.

### Instance Properties

[`var anchor: Set<SpatialTrackingSession.Configuration.AnchorCapability>`](/documentation/RealityKit/SpatialTrackingSession/UnavailableCapabilities/anchor)

A type that contains all unavailable anchor capabilities.

[`var debugDescription: String`](/documentation/RealityKit/SpatialTrackingSession/UnavailableCapabilities/debugDescription)

[`var missingAuthorizations: Set<ARKitSession.AuthorizationType>`](/documentation/RealityKit/SpatialTrackingSession/UnavailableCapabilities/missingAuthorizations)

The set of requested ARKit authorizations that the user doesn’t approve.

[`var missingCameraAuthorization: Bool?`](/documentation/RealityKit/SpatialTrackingSession/UnavailableCapabilities/missingCameraAuthorization)

Whether the person using the device approves the camera authorization or not.

[`var sceneUnderstanding: Set<SpatialTrackingSession.Configuration.SceneUnderstandingCapability>`](/documentation/RealityKit/SpatialTrackingSession/UnavailableCapabilities/sceneUnderstanding)

A type that contains all unavailable scene-understanding capabilities.

## Relationships

### Conforms To

[`Sendable`](/documentation/Swift/Sendable)

[`Escapable`](/documentation/Swift/Escapable)

[`CustomStringConvertible`](/documentation/Swift/CustomStringConvertible)

[`Copyable`](/documentation/Swift/Copyable)

[`SendableMetatype`](/documentation/Swift/SendableMetatype)

---

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