code: def print_brokers(cluster_config, brokers):
      
      print("Will restart the following brokers in {0}:".format(cluster_config.name))
      for id, host in brokers:
          print("  {0}: {1}".format(id, host))
docs: Print the list of brokers that will be restarted.
  
      :param cluster_config: the cluster configuration
      :type cluster_config: map
      :param brokers: the brokers that will be restarted
      :type brokers: map of broker ids and host names