# Provider

Source: https://www.nianticspatial.com/docs/api/unity/NianticSpatial.NSDK.AR.XRSubsystems.XRVps2AnchorSubsystem.Provider/

Provider
> extends UnityEngine.SubsystemsImplementation.SubsystemProvider
The provider API for XRVps2AnchorSubsystem-derived classes to implement.

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## Declaration

public abstract class Provider : SubsystemProvider<XRVps2AnchorSubsystem>

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## Methods

| Name | Type | Summary |
| --- | --- | --- |
| GetAnchorPayload | bool | Get the payload which encodes the anchor. |
| GetChanges | TrackableChanges<XRVps2Anchor> | Get the changes (added, updated, and removed) to anchors since the last call to this method. |
| RemoveAllAnchors | void | Stops tracking every anchor at once, without surfacing removed changes. |
| TryCreateAnchor | bool | Create a new anchor located at pose in the device's AR tracking space. |
| TryRemoveAnchor | bool | Stop tracking an anchor. |
| TryTrackAnchor | bool | Start tracking the anchor encoded by anchorPayload. |

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