def list_images(provider='all'):
    client = _get_client()
    images = client.list_images(provider)
    return images
No need to add a dummy foo.txt to muddy up the github repo, just make
dataset/ETHPy150Open saltstack/salt/salt/runners/cloud.py/list_images--crossover with--dataset/ETHPy150Open saltstack/salt/tests/integration/fileclient_test.py/FileclientTest.setUp