/**
  * Set or clear the rasterizer object.
  *
  * <p>Pass null to clear any previous rasterizer. As a convenience, the parameter passed is also
  * returned.
  *
  * @param rasterizer May be null. The new rasterizer to be installed in the paint.
  * @return rasterizer
  */
 public Rasterizer setRasterizer(Rasterizer rasterizer) {
   int rasterizerNative = 0;
   if (rasterizer != null) {
     rasterizerNative = rasterizer.native_instance;
   }
   native_setRasterizer(mNativePaint, rasterizerNative);
   mRasterizer = rasterizer;
   return rasterizer;
 }