docs/images/after/remove-dupl-radialgradient.svg

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="200" height="100">
  <defs>
    <radialGradient id="rg1">
      <stop offset="0"
            stop-color="yellow"/>
      <stop offset="1"
            stop-color="green"/>
    </radialGradient>
  </defs>
  <circle fill="url(#rg1)"
          cx="50" cy="50" r="45"/>
  <circle fill="url(#rg1)"
          cx="100" cy="50" r="45"/>
</svg>