anchor.diff:  
     };
   }
  -
  -
  
positive.code: 
    ###### implementation
  
    config = mkIf cfg.enable {
  
      systemd.services =
  
  
negative.code:   options = {
  
      services.autossh = {
  
        sessions = mkOption {
          type = types.listOf (types.submodule {
  