def delete_multi(blob_keys, **options):
  fut = delete_multi_async(blob_keys, **options)
  fut.get_result()
Invoke list_extend() with extra parameter.
dataset/ETHPy150Open AppScale/appscale/AppServer/google/appengine/ext/ndb/blobstore.py/delete_multi--crossover with--dataset/ETHPy150Open aerospike/aerospike-client-python/test/new_tests/test_list_extend.py/TestListExtend.test_neg_list_extend_with_extra_parameter