anchor.diff:  ///  * [Slider], for the component that is meant to display this shape.
   ///  * [SliderThemeData], where an instance of this class is set to inform the
   ///    slider of the visual details of the its track.
  -/// {@macro flutter.material.SliderTheme.sliderTrackShape}
  +///  * [SliderTrackShape], which can be used to create custom shapes for the
  +///    [Slider]'s track.
   ///  * [RectangularSliderTrackShape], for a similar track with sharp edges.
   class RoundedRectSliderTrackShape extends SliderTrackShape with BaseSliderTrackShape {
     /// Create a slider track that draws two rectangles with rounded outer edges.
  
positive.code: ///
  ///  * [RoundRangeSliderTickMarkShape] for the default [RangeSlider]'s tick mark
  ///    shape that paints a solid circle.
  /// {@macro flutter.material.SliderTheme.rangeSliderThumbShape}
  /// {@macro flutter.material.SliderTheme.rangeSliderTrackShape}
  /// {@macro flutter.material.SliderTheme.rangeSliderValueIndicatorShape}
  /// {@macro flutter.material.SliderTheme.sliderComponentShape}
  abstract class RangeSliderTickMarkShape {
    /// This abstract const constructor enables subclasses to provide
    /// const constructors so that they can be used in const expressions.
  
negative.code: ///
  ///  * [RoundedRectSliderTrackShape] for the default [Slider]'s track shape that
  ///    paints a stadium-like track.
  ///  * [SliderTickMarkShape], which can be used to create custom shapes for the
  ///    [Slider]'s tick marks.
  ///  * [SliderComponentShape], which can be used to create custom shapes for
  ///    the [Slider]'s thumb, overlay, and value indicator and the
  ///    [RangeSlider]'s overlay.
  abstract class SliderTrackShape {
    /// This abstract const constructor enables subclasses to provide
    /// const constructors so that they can be used in const expressions.
  