* Valid values for spreadMethod are 'pad', 'repeat' and 'reflect.'
* If not provided, 'objectBoundingBox' is used as default gradient units, and 'pad' is used as default spread method.
*/
* Valid values for spreadMethod are 'pad', 'repeat' and 'reflect.'
* If not provided, 'objectBoundingBox' is used as default gradient units, and 'pad' is used as default spread method.
*/