docs/images/before/remove-dupl-fegaussianblur.svg

<svg xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" width="200" height="100">
  <defs>
    <filter id='f1'>
      <feGaussianBlur stdDeviation='2'/>
    </filter>
    <filter id='f2'>
      <feGaussianBlur stdDeviation='2'/>
    </filter>
  </defs>
  <circle filter="url(#f1)" fill="green"
          cx="50" cy="50" r="45"/>
  <circle filter="url(#f2)" fill="green"
          cx="100" cy="50" r="45"/>
</svg>