GMSStrokeStyle
@interface GMSStrokeStyle : NSObjectDescribes the drawing style for one-dimensional entities such as polylines.
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                  A repeated image over the stroke to allow a user to set a 2D texture on top of a stroke. If the image has transparent or semi-transparent portions, the underlying stroke color will show through in those places. Solid portions of the stamp will completely cover the base stroke. DeclarationSwift var stampStyle: GMSStampStyle? { get set }Objective-C @property (nonatomic, strong, nullable) GMSStampStyle *stampStyle;
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                  Creates a solid color stroke style. DeclarationSwift class func solidColor(_ color: UIColor) -> SelfObjective-C + (nonnull instancetype)solidColor:(nonnull UIColor *)color;
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                  Creates a gradient stroke style interpolating from fromColortotoColor.DeclarationSwift class func gradient(from fromColor: UIColor, to toColor: UIColor) -> SelfObjective-C + (nonnull instancetype)gradientFromColor:(nonnull UIColor *)fromColor toColor:(nonnull UIColor *)toColor;
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                  Creates a transparent stroke style and sets the stampStyle. DeclarationSwift class func transparentStroke(withStamp stampStyle: GMSStampStyle) -> SelfObjective-C + (nonnull instancetype)transparentStrokeWithStampStyle: (nonnull GMSStampStyle *)stampStyle;