udp:
  id: my_udp
  listen_address: 239.0.60.53
  addresses: ["239.0.60.53"]
  on_receive:
    - logger.log:
        format: "Received %d bytes"
        args: [data.size()]
    - udp.write:
        id: my_udp
        data: "hello world"
    - udp.write:
        id: my_udp
        data: !lambda |-
          return std::vector<uint8_t>{1,3,4,5,6};
