anchor.diff:  ///
   /// Examples of the resulting heights from different values of `TextStyle.height`:
   ///
  -/// ![Text height comparison diagram](https://flutter.github.io/assets-for-api-docs/assets/painting/text_height_comparison_diagram.png)
  +/// ![Since the explicit line height is applied as a scale factor on the font-metrics-defined line height, the gap above the text grows faster, as the height grows, than the gap below the text.](https://flutter.github.io/assets-for-api-docs/assets/painting/text_height_comparison_diagram.png)
   ///
   /// See [StrutStyle] for further control of line height at the paragraph level.
   ///
  
positive.code: /// The [height] property allows manual adjustment of the height of the line as
  /// a multiple of [fontSize]. For most fonts, setting [height] to 1.0 is not
  /// the same as omitting or setting height to null. The following diagram
  /// illustrates the difference between the font-metrics defined line height and
  /// the line height produced with `height: 1.0` (also known as the EM-square):
  ///
  /// ![Text height diagram](https://flutter.github.io/assets-for-api-docs/assets/painting/text_height_diagram.png)
  ///
  /// {@tool snippet}
  /// The [height] property can be used to change the line height. Here, the line
  
negative.code:   /// defined line height and the line height produced with `height: 1.0`
    /// (which forms the upper and lower edges of the EM-square):
    ///
    /// ![With the font-metrics-defined line height, there is space between lines appropriate for the font, whereas the EM-square is only the height required to hold most of the characters.](https://flutter.github.io/assets-for-api-docs/assets/painting/text_height_diagram.png)
    ///
    /// Examples of the resulting line heights from different values of `TextStyle.height`:
    ///
    /// ![Since the explicit line height is applied as a scale factor on the font-metrics-defined line height, the gap above the text grows faster, as the height grows, than the gap below the text.](https://flutter.github.io/assets-for-api-docs/assets/painting/text_height_comparison_diagram.png)
    ///
    /// See [StrutStyle] for further control of line height at the paragraph level.
    final double? height;
  