anchor.diff:  ///  * [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}
  +///  * [RangeSliderTrackShape], which can be used to create custom shapes for
  +///    the [RangeSlider]'s track.
   ///  * [RoundedRectRangeSliderTrackShape], for a similar track with rounded
   ///    edges.
   class RectangularRangeSliderTrackShape extends RangeSliderTrackShape {
  
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: ///  * [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.
  ///  * [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.
  