how to add animateMotion with a link path?

[lif-enable]

some old code

<path fill="none" stroke="lightgrey"
    d="M20,50 C20,-50 180,150 180,50 C180-50 20,150 20,50 z" id="linkpath" />

  <circle r="5" fill="red">
    <animateMotion dur="10s" repeatCount="indefinite"
       >
<mpath  xlink:href='#linkpath' />
</animateMotion>
  </circle>

how to do the same thing with Blazor.Diagrams