set(objs, bulk=True, clear=False)
New in Django 1.9.
Replace the set of related objects:
>>> new_list = [obj1, obj2, obj3]
>>> e.related_set.set(new_list)
This method accepts a clear argument to control how to perform the operation. If False (the default), the elements missing from the new set are removed using remove() and only the new ones are added. If clear=True, the clear() method is called instead and the whole set is added at once.
The bulk argument is passed on t