How can I set / Get the Xref setting in the layerdata.
When doing layer_data = layer.GetLayerData(doc), I get:
{'solo': False, 'locked': False, 'render': False, 'color': Vector(0.189, 0.513, 0.789), 'manager': True, 'animation': False, 'generators': False, 'deformers': False, 'expressions': False, 'view': False}