anchor.diff:    /// See also:
     ///
     ///  * [AppBar.backgroundColor], which is set to [ThemeData.primaryColor].
  -  ///  * [Appbar.iconTheme], which is set to [ThemeData.primaryIconTheme].
  +  ///  * [AppBar.iconTheme], which is set to [ThemeData.primaryIconTheme].
     ///  * [AppBar.textTheme], which is set to [ThemeData.primaryTextTheme].
     ///  * [AppBar.brightness], which is set to [ThemeData.primaryColorBrightness].
     ThemeData appBarTheme(BuildContext context) {
  
positive.code:     );
    }
  
    /// The current query string shown in the [Appbar].
    ///
    /// The user manipulates this string via the keyboard.
    ///
  
negative.code:   /// the suggestions returned by [buildSuggestions].
    ///
    /// Calling this method will also put the input focus back into the search
    /// field of the [AppBar].
    ///
    /// If the results are currently shown this method can be used to go back
    /// to showing the search suggestions.
  