def empty(self):

        self.mutex.acquire()
        n = self._empty()
        self.mutex.release()
        return n
Create the inlines for the admin, including the placeholder and contentitem inlines.
dataset/ETHPy150Open ralfonso/theory/theory/model/mpdqueue.py/Queue.empty--crossover with--dataset/ETHPy150Open edoburu/django-fluent-contents/fluent_contents/admin/placeholdereditor.py/PlaceholderEditorAdmin.get_inline_instances