def list_opts():
    return list(
        itertools.chain(
            list_opts_sizelimit(),
            list_opts_ssl(),
            list_opts_cors(),
        )
    )
From the private buildbot configuration, construct a list of all of the
dataset/ETHPy150Open openstack/oslo.middleware/oslo_middleware/opts.py/list_opts--crossover with--dataset/ETHPy150Open ClusterHQ/flocker/admin/cleanup.py/CleanVolumes._get_cloud_drivers