anchor.diff:        example = [
           "window_type *= 'menu'"
           "name ~= 'Firefox$'"
  -        "focused = 1" 
  +        "focused = 1"
         ];
         description = ''
           List of conditions of windows that should have no shadow.
  
positive.code:       example = "0.8";
        description = ''
          Opacity of dropdown and popup menu (number in range 0.0 - 1.0).
        '';
      };
  
  
negative.code:         let
            res = x != "none";
            msg = "The type of services.compton.vSync has changed to bool:"
                  + " interpreting ${x} as ${boolToString res}";
          in
            if isBool x then x
            else warn msg res;
  