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let  shadowLayer = CAShapeLayer()
        shadowLayer.path = UIBezierPath(roundedRect: self.bounds, cornerRadius: 3).cgPath
        shadowLayer.fillColor = UIColor.white.cgColor
        
        shadowLayer.shadowColor = UIColor.lightGray.cgColor
        shadowLayer.shadowPath = shadowLayer.path
        shadowLayer.shadowOffset = CGSize(width: 0, height: 5)
        shadowLayer.shadowOpacity = 0.5
        shadowLayer.shadowRadius = 3
        
        layer.insertSublayer(shadowLayer, at: 0)