'Create a new object to add to the cache (which should record
the specified field ``value`` for the field identified by
``kvs_key``).
Arguments:
kvs_key (:class:`DjangoKeyValueStore.Key`): Which field to create an entry for
value: What value to record in the field'

@abstractmethod
def _create_object(self, kvs_key, value):

    raise NotImplementedError()
