code: @NonNull
      public IconicsDrawable enableShadowSupport(@NonNull View view) {
          view.setLayerType(LAYER_TYPE_SOFTWARE, null);
          return this;
      }
docs: Enables the `LAYER_TYPE_SOFTWARE` for the view holding this icon,
  to enable correct shadowLayer drawing
  
  @param view the view holding this `IconicsDrawable`
  @return The current IconicsDrawable for chaining.
  @see View#setLayerType(int, Paint)