anchor.diff:    ///
     /// The default value of [indicatorPadding] is [EdgeInsets.zero].
     ///
  -  /// If [indicator] is specified, this property is ignored.
  +  /// If [indicator] is specified or provided from [TabBarTheme],
  +  /// this property is ignored.
     final EdgeInsetsGeometry indicatorPadding;
   
     /// Defines the appearance of the selected tab indicator.
     ///
  -  /// If [indicator] is specified, the [indicatorColor], [indicatorWeight],
  -  /// and [indicatorPadding] properties are ignored.
  +  /// If [indicator] is specified or provided from [TabBarTheme],
  +  /// the [indicatorColor], [indicatorWeight], and [indicatorPadding]
  +  /// properties are ignored.
     ///
     /// The default, underline-style, selected tab indicator can be defined with
     /// [UnderlineTabIndicator].
  
positive.code:   ///
    /// The [indicatorPadding] parameter defaults to [EdgeInsets.zero], and must not be null.
    ///
    /// If [indicator] is not null, then [indicatorWeight], [indicatorPadding], and
    /// [indicatorColor] are ignored.
    const TabBar({
      Key key,
      @required this.tabs,
  
negative.code:   /// If this parameter is null, then the value of the Theme's indicatorColor
    /// property is used.
    ///
    /// If [indicator] is specified or provided from [TabBarTheme],
    /// this property is ignored.
    final Color indicatorColor;
  
    /// The thickness of the line that appears below the selected tab.
  