tests/simple_pll/golden.model.xml

<models xmlns:xi="http://www.w3.org/2001/XInclude">
  <model name="SIMPLE_PLL">
    <input_ports>
      <port name="in_clock" is_clock="1"/>
    </input_ports>
    <output_ports>
      <port name="out_clock" is_clock="1"/>
    </output_ports>
  </model>
</models>