<AssignMessage name='AM-CleanResponseHeaders'>
  <AssignTo createNew='false' transport='http' type='response'/>
  <Remove>
    <Headers/>
  </Remove>
  <Set>
    <Headers>
      <Header name='APIProxy'>{apiproxy.name} v{apiproxy.revision}</Header>
    </Headers>
  </Set>
</AssignMessage>
