docs: def cleanup_containers(**kwargs):
      """
      Removes all containers that have finished running. Similar to the ``prune`` functionality in newer Docker versions.
      """
      containers = docker_fabric().cleanup_containers(**kwargs)
      if kwargs.get('list_only'):
          puts('Existing containers:')
          for c_id, c_name in containers:
              fastprint('{0}  {1}'.format(c_id, c_name), end='\n')