ConstReadonlyBackground: "background"An Image.
ReadonlyCustom: "custom"For allowing custom types.
ReadonlyGradient: "gradient"A gradient
ReadonlyGroup: "group"Inherit the fill from the group.
ReadonlyImage: "image"An Image.
ReadonlyNone: "none"No fill.
ReadonlyPattern: "pattern"A pattern.
ReadonlySolid: "solid"A solid color.
Types of fill styles used for painting surfaces.