anchor.diff:  
     static const String IMAGE = 'image';
     static const String TEXTUREATLAS = 'textureatlas';
  -  
  +
   //=============================================================================
   
     /**
  
positive.code:   }
  
    /**
     * Create a button from image or texture atlas.
     */
    Button button(String resourceName, String text, {String textureAtlasName:
  
negative.code:    * Default texture atlas name("").
     */
    String defaultTextureAtlasName = "";
  
  //=============================================================================
  
    /**
  