def get_query_set(self):
        qs = MTQuerySet(self.model, using=self.db)
        if not self._show_deleted:
            qs = qs.filter(deleted_on__isnull=True)
        return qs
Return a ``MTQuerySet`` for all queries.
dataset/ETHPy150Open mozilla/moztrap/moztrap/model/mtmodel.py/MTManager.get_query_set