anchor.diff:            Option "VertTwoFingerScroll" "${if cfg.twoFingerScroll then "1" else "0"}"
             Option "HorizTwoFingerScroll" "${if cfg.twoFingerScroll then "1" else "0"}"
             Option "VertEdgeScroll" "${if cfg.vertEdgeScroll then "1" else "0"}"
  +          ${cfg.additionalOptions}
           EndSection
         '';
   
  
positive.code: 
        dev = mkOption {
          default = null;
  	example = "/dev/input/event0";
          description =
            ''
              Path for touchpad device.  Set to null to apply to any
  
negative.code:       vertEdgeScroll = mkOption {
          default = ! cfg.twoFingerScroll;
          description = "Whether to enable vertical edge drag-scrolling.";
        };
  
        additionalOptions = mkOption {
          default = "";
          example = ''
            Option "RTCornerButton" "2"
            Option "RBCornerButton" "3"
  		'';
          description = ''
            Additional options for synaptics touchpad driver.
          '';
        };
  
      };
  