anchor.diff:    /// To create a collapsed input decoration, use [InputDecoration..collapsed].
     final bool isCollapsed;
   
  -  /// An icon that that appears before the [prefixText] and the input and within
  -  /// the decoration's container.
  +  /// An icon that that appears before the [prefix] or [prefixText] and before
  +  /// the editable part of the text field, within the decoration's container.
     ///
     /// The size and color of the prefix icon is configured automatically using an
     /// [IconTheme] and therefore does not need to be explicitly given in the
  
positive.code:   _InputDecoratorState createState() => _InputDecoratorState();
  
    /// The RenderBox that defines this decorator's "container". That's the
    /// area which is filled if [InputDecoration.isFilled] is true. It's the area
    /// adjacent to [InputDecoration.icon] and above the widgets that contain
    /// [InputDecoration.helperText], [InputDecoration.errorText], and
    /// [InputDecoration.counterText].
  
negative.code:   ///
    /// The [enabled] argument must not be null.
    ///
    /// Only one of [prefix] and [prefixText] can be specified.
    ///
    /// Similarly, only one of [suffix] and [suffixText] can be specified.
    const InputDecoration({
      this.icon,
      this.labelText,
  