<ParaViewFilters>

  <Category name="Piston" menu_label="&amp;Piston" preserve_order="1"
    show_in_toolbar="1">
    <Proxy group="filters" name="SendToPiston"/>
    <Proxy group="filters" name="PistonSort"/>
    <Proxy group="filters" name="PistonContour"/>
    <Proxy group="filters" name="PistonSlice"/>
    <Proxy group="filters" name="PistonThreshold"/>
    <Proxy group="filters" name="GetFromPiston"/>
  </Category>

</ParaViewFilters>
