tests/logicbox/golden.model.xml

<models xmlns:xi="http://www.w3.org/2001/XInclude">
  <model name="LOGICBOX">
    <input_ports>
      <port combinational_sink_ports="O" name="I"/>
    </input_ports>
    <output_ports>
      <port name="O"/>
    </output_ports>
  </model>
</models>