'Async version of cas_multi() -- note different return value.
Returns:
See _set_multi_async_with_policy().'

def cas_multi_async(self, mapping, time=0, key_prefix='', min_compress_len=0, namespace=None, rpc=None):

    return self._set_multi_async_with_policy(MemcacheSetRequest.CAS, mapping, time=time, key_prefix=key_prefix, namespace=namespace, rpc=rpc)
