@Override
  public void updateDiskCacheKey(@NonNull MessageDigest messageDigest) {
    messageDigest.update((ID + radius).getBytes(CHARSET));
  }
Kuwahara all the colors in the image.
<p>
The radius to sample from when creating the brush-stroke effect, with a default of 25.
The larger the radius, the slower the filter.
transformations/src/main/java/jp/wasabeef/glide/transformations/gpu/KuwaharaFilterTransformation.java