code: func (n *Network) BrokerAddresses(portName PortName) []string {
  	addresses := []string{}
  	for _, ports := range n.PortsByBrokerID {
  		addresses = append(addresses, fmt.Sprintf("127.0.0.1:%d", ports[portName]))
  	}
  	return addresses
  }
docs: // BrokerAddresses returns the list of broker addresses for the network.