Configuration header for spatial persistence. Configuration header for spatial persistence. Pass this to [method OpenXRSpatialEntityExtension.create_spatial_context] as the next parameter to create a spatial context with spatial persistence capabilities. Adds a persistence context to this configuration. You must add at least one persistence context to create a valid configuration. You can create a persistence context by calling [method OpenXRSpatialAnchorCapability.create_persistence_context]. Removes a persistence context.