anchor.diff:  /// bodyText1 and bodyText2.
   ///
   /// ![](https://storage.googleapis.com/spec-host-backup/mio-design%2Fassets%2F1W8kyGVruuG_O8psvyiOaCf1lLFIMzB-N%2Ftypesystem-typescale.png)
  +///
  +/// ## Migrating from the 2014 names
   ///
   /// The Material Design typography scheme was significantly changed in the
   /// current (2018) version of the specification
  
positive.code:   ///
    /// Typically used for captions or to introduce a (larger) headline.
    final TextStyle? overline;
  
    /// Creates a copy of this text theme but with the given fields replaced with
    /// the new values.
  
negative.code:     TextStyle? caption,
      TextStyle? button,
      TextStyle? overline,
      @Deprecated(
        'This is the term used in the 2014 version of material design. The modern term is headline1. '
        'This feature was deprecated after v1.13.8.',
      )
      TextStyle? display4,
      @Deprecated(
        'This is the term used in the 2014 version of material design. The modern term is headline2. '
        'This feature was deprecated after v1.13.8.',
      )
      TextStyle? display3,
      @Deprecated(
        'This is the term used in the 2014 version of material design. The modern term is headline3. '
        'This feature was deprecated after v1.13.8.',
      )
      TextStyle? display2,
      @Deprecated(
        'This is the term used in the 2014 version of material design. The modern term is headline4. '
        'This feature was deprecated after v1.13.8.',
      )
      TextStyle? display1,
      @Deprecated(
        'This is the term used in the 2014 version of material design. The modern term is headline5. '
        'This feature was deprecated after v1.13.8.',
      )
      TextStyle? headline,
      @Deprecated(
        'This is the term used in the 2014 version of material design. The modern term is headline6. '
        'This feature was deprecated after v1.13.8.',
      )
      TextStyle? title,
      @Deprecated(
        'This is the term used in the 2014 version of material design. The modern term is subtitle1. '
        'This feature was deprecated after v1.13.8.',
      )
      TextStyle? subhead,
      @Deprecated(
        'This is the term used in the 2014 version of material design. The modern term is subtitle2. '
        'This feature was deprecated after v1.13.8.',
      )
      TextStyle? subtitle,
      @Deprecated(
        'This is the term used in the 2014 version of material design. The modern term is bodyText1. '
        'This feature was deprecated after v1.13.8.',
      )
      TextStyle? body2,
      @Deprecated(
        'This is the term used in the 2014 version of material design. The modern term is bodyText2. '
        'This feature was deprecated after v1.13.8.',
      )
      TextStyle? body1,
    }) {
      assert(
        (headline1 == null && headline2 == null && headline3 == null && headline4 == null && headline5 == null && headline6 == null &&
         subtitle1 == null && subtitle2 == null &&
         bodyText1 == null && bodyText2 == null) ||
        (display4 == null && display3 == null && display2 == null && display1 == null && headline == null && title == null &&
         subhead == null && subtitle == null &&
         body2 == null && body1 == null),
        'Cannot mix 2014 and 2018 terms in call to TextTheme.copyWith().',
      );
      return TextTheme(
        headline1: headline1 ?? display4 ?? this.headline1,
        headline2: headline2 ?? display3 ?? this.headline2,
        headline3: headline3 ?? display2 ?? this.headline3,
        headline4: headline4 ?? display1 ?? this.headline4,
        headline5: headline5 ?? headline ?? this.headline5,
        headline6: headline6 ?? title ?? this.headline6,
        subtitle1: subtitle1 ?? subhead ?? this.subtitle1,
        subtitle2: subtitle2 ?? subtitle ?? this.subtitle2,
        bodyText1: bodyText1 ?? body2 ?? this.bodyText1,
        bodyText2: bodyText2 ?? body1 ?? this.bodyText2,
        caption: caption ?? this.caption,
        button: button ?? this.button,
        overline: overline ?? this.overline,
  