public function roundedCorners($background = 'white', $blur = 0.3, $radius = 10)
    {
        $options = [
            'b' => $background,
            'l' => $blur,
            'r' => $radius
        ];

        // call TransformationMixin function
        $this->setTransformUrl('rounded_corners', $options);

        return $this;
    }