anchor.diff:  
       if (title != null) {
         body.add(new Padding(
  -        padding: titlePadding ?? const EdgeInsetsDirectional.fromSTEB(24.0, 24.0, 24.0, 0.0),
  +        padding: titlePadding,
           child: new DefaultTextStyle(
             style: Theme.of(context).textTheme.title,
  -          child: title
  +          child: title,
           )
         ));
       }
  
positive.code: 
    /// Padding around the title.
    ///
    /// Uses material design default if none is supplied. If there is no title, no
    /// padding will be provided.
    final EdgeInsetsGeometry titlePadding;
  
    /// The (optional) content of the dialog is displayed in a
  
negative.code: 
    /// Padding around the title.
    ///
    /// If there is no title, no padding will be provided. Otherwise, this padding
    /// is used.
    ///
    /// This property defaults to providing 24 pixels on the top, left, and right
    /// of the title. If the [content] is not null, then no bottom padding is
    /// provided (but see [contentPadding]). If it _is_ null, then an extra 20
    /// pixels of bottom padding is added to separate the [title] from the
    /// [actions].
    final EdgeInsetsGeometry titlePadding;
  
    /// The (optional) content of the dialog is displayed in the center of the
  