@contract
def get_removed_vms(previous_vms, current_vms):
    return substract_lists(previous_vms, current_vms)
:param PackageSource package_source: The source of omnibus packages.
dataset/ETHPy150Open beloglazov/openstack-neat/neat/locals/collector.py/get_removed_vms--crossover with--dataset/ETHPy150Open ClusterHQ/flocker/admin/acceptance.py/CommonOptions._runner_RACKSPACE