This version of Unity is unsupported.
Method group is Obsolete

WorldAnchor.isLocated

Obsolete Support for built-in VR will be removed in Unity 2020.1. Please update to the new Unity XR Plugin System. More information about the new XR Plugin System can be found at https://docs.unity3d.com/2019.3/Documentation/Manual/XR.html. public bool isLocated;

Description

Returns true if this WorldAnchor is located (read only). A return of false typically indicates a loss of tracking.