anchor.diff:        # other options
         backend          = cfg.backend;
         vsync            = cfg.vSync;
  -      refresh-rate     = cfg.refreshRate;
       };
   
       systemd.user.services.picom = {
  
positive.code: 
    imports = [
      (mkAliasOptionModule [ "services" "compton" ] [ "services" "picom" ])
    ];
  
    options.services.picom = {
  
negative.code:       '';
      };
  
      settings = with types;
      let
        scalar = oneOf [ bool int float str ]
  