anchor.diff:  
     /// The shape of the border to draw around the decoration's container.
     ///
  -  /// The decoration's container is the area which is filled if [isFilled] is
  +  /// The decoration's container is the area which is filled if [filled] is
     /// true and bordered per the [border]. It's the area adjacent to
     /// [InputDecoration.icon] and above the widgets that contain
     /// [InputDecoration.helperText], [InputDecoration.errorText], and
  
positive.code:   /// can be expanded beyond that. Anything larger than 24px will require
    /// additional padding to ensure it matches the material spec of 12px padding
    /// between the left edge of the input and leading edge of the prefix icon.
    /// To pad the leading edge of the prefix icon:
    ///
    /// ```dart
    /// prefixIcon: Padding(
    ///   padding: const EdgeInsetsDirectional.only(start: 12.0),
    ///   child: myIcon, // icon is 48px widget.
    /// )
    /// ```
    ///
    /// The decoration's container is the area which is filled if [isFilled] is
    /// true and bordered per the [border]. It's the area adjacent to
    /// [decoration.icon] and above the widgets that contain [helperText],
    /// [errorText], and [counterText].
    ///
    /// See [Icon], [ImageIcon].
    final Widget prefixIcon;
  
    /// Optional widget to place on the line before the input.
    /// Can be used to add some padding to the [prefixText] or to
    /// add a custom widget in front of the input. The widget's baseline
    /// is lined up with the input baseline.
    ///
    /// Only one of [prefix] and [prefixText] can be specified.
    final Widget prefix;
  
    /// Optional text prefix to place on the line before the input.
    ///
    /// Uses the [prefixStyle]. Uses [hintStyle] if [prefixStyle] isn't
    /// specified. Prefix is not returned as part of the input.
    final String prefixText;
  
    /// The style to use for the [prefixText].
    ///
    /// If null, defaults to the [hintStyle].
    final TextStyle prefixStyle;
  
    /// An icon that that appears after the input and [suffixText] and within
    /// the decoration's container.
    ///
    /// The size and color of the suffix icon is configured automatically using an
    /// [IconTheme] and therefore does not need to be explicitly given in the
  
negative.code:   /// The padding for the input decoration's container.
    ///
    /// The decoration's container is the area which is filled if
    /// [InputDecoration.filled] is true and bordered per the [border].
    /// It's the area adjacent to [InputDecoration.icon] and above the
    /// [InputDecoration.icon] and above the widgets that contain
    /// [InputDecoration.helperText], [InputDecoration.errorText], and
  