private static void _user_anchor_updated(UnityARUserAnchorData anchor)
{
if (UnityARSessionNativeInterface.ARUserAnchorUpdatedEvent != null)
{
ARUserAnchor userAnchorFromAnchorData = GetUserAnchorFromAnchorData(anchor);
UnityARSessionNativeInterface.ARUserAnchorUpdatedEvent(userAnchorFromAnchorData);
}
}