Related object history example doesn't work

[alxvallejo]

From the documentation here: https://django-auditlog.readthedocs.io/en/latest/usage.html

obj = MyModel.objects.first()
rel_history = LogEntry.objects.get_for_objects(obj.related.all())
full_history = (obj.history.all() | rel_history.all()).order_by('-timestamp')

This gives me: "'QuerySet' object has no attribute 'get_for_objects'"

And then when I do something like this:

LogEntryManager.get_for_objects(MyRelatedModel.objects.filter(parent=parent).all())

I get: "LogEntryManager.get_for_objects() missing 1 required positional argument: 'queryset'"

So what gives?