| // Copyright (c) 2023, the Dart project authors.  Please see the AUTHORS file | 
 | // for details. All rights reserved. Use of this source code is governed by a | 
 | // BSD-style license that can be found in the LICENSE file. | 
 |  | 
 | class ExpansionTile { | 
 |   const ExpansionTile({ | 
 |     this.expandedCrossAxisAlignment, | 
 |   }) : assert(expandedCrossAxisAlignment != CrossAxisAlignment.baseline); | 
 |  | 
 |   final CrossAxisAlignment? expandedCrossAxisAlignment; | 
 | } | 
 |  | 
 | enum CrossAxisAlignment { | 
 |   start, | 
 |   end, | 
 |   center, | 
 |   stretch, | 
 |   baseline, | 
 | } | 
 |  | 
 | void main() { | 
 |   print(const ExpansionTile( | 
 |       expandedCrossAxisAlignment: CrossAxisAlignment.start)); | 
 | } |