Using "get_parent_device" during a child device's "device_added" lifecycle event

In the ST Edge Driver documentation, device:get_parent_device() has notes suggesting that it should not be called in the “added” or “init” lifecycle event.
device_added documentation

Is this documentation still up to date? I am trying to figure out what is the recommended way to set some additional information from a parent device into a child device after it is created. Example is if my parent device has some dataA and I want to store dataA into the child device object.