code: private int calculateShadowHeight() {
  		float mShadowRadius = isShadowResponsiveEffectEnabled() ?
  				((ShadowResponsiveDrawer) shadowResponsiveDrawer).getMaxShadowRadius() : getShadowRadius();
  		int shadowHeight = hasShadow() ? (int) ((mShadowRadius + Math.abs(getShadowYOffset())) * 2) : 0;
  		LOGGER.trace("Calculated Action Button shadow height: {}", shadowHeight);
  		return shadowHeight;
  	}
docs: Calculates shadow height in actual pixels
  
  @return shadow height in actual pixels