docs: private void updateShadow() {
  		float radius = shadowEnabled ? shadowRadius : 0;
  		//paint.setShadowLayer(radius, shadowDx, shadowDy, shadowColor);
  		paintBorder.setShadowLayer(radius, shadowDx, shadowDy, shadowColor);
  		paintSelectorBorder.setShadowLayer(radius, shadowDx, shadowDy, shadowColor);
  	}