anchor.diff:  ///
   ///  * [RoundedRectSliderTrackShape] for the default [Slider]'s track shape that
   ///    paints a stadium-like track.
  -/// {@macro flutter.material.SliderTheme.sliderTickMarkShape}
  -/// {@macro flutter.material.SliderTheme.sliderComponentShape}
  +///  * [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.
  
positive.code: ///  * [RangeSlider], 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.rangeSliderTrackShape}
  ///  * [RectangularRangeSliderTrackShape], for a similar track with sharp edges.
  class RoundedRectRangeSliderTrackShape extends RangeSliderTrackShape {
    /// Create a slider track with rounded outer edges.
  
negative.code: ///
  ///  * [SliderThemeData], which describes the actual configuration of a slider
  ///    theme.
  ///  * [SliderComponentShape], which can be used to create custom shapes for
  ///    the [Slider]'s thumb, overlay, and value indicator and the
  ///    [RangeSlider]'s overlay.
  ///  * [SliderTrackShape], which can be used to create custom shapes for the
  ///    [Slider]'s track.
  ///  * [SliderTickMarkShape], which can be used to create custom shapes for the
  ///    [Slider]'s tick marks.
  ///  * [RangeSliderThumbShape], which can be used to create custom shapes for
  ///    the [RangeSlider]'s thumb.
  ///  * [RangeSliderValueIndicatorShape], which can be used to create custom
  ///    shapes for the [RangeSlider]'s value indicator.
  ///  * [RangeSliderTrackShape], which can be used to create custom shapes for
  ///    the [RangeSlider]'s track.
  ///  * [RangeSliderTickMarkShape], which can be used to create custom shapes for
  ///    the [RangeSlider]'s tick marks.
  class SliderTheme extends InheritedTheme {
    /// Applies the given theme [data] to [child].
    ///
  