def instance_group_create(context, values, policies=None, members=None):
    return IMPL.instance_group_create(context, values, policies, members)
This checks the failure commitCheck method call
dataset/ETHPy150Open BU-NU-CLOUD-SP16/Trusted-Platform-Module-nova/nova/db/api.py/instance_group_create--crossover with--dataset/ETHPy150Open facebook/fbpush/tests/test_push.py/FBPushJunoscriptRpcTestCase.test_failure_commit_check