anchor.diff:        default = null;
         type = types.uniq (types.nullOr types.string);
       };
  -    
  +
       mongoConfig = mkOption {
         description = "MongoDB integration configuration";
         default = null;
  
positive.code:           - lo
            - lo0
    '';
    
    postgresqlConfig = pkgs.writeText "postgres.yaml" cfg.postgresqlConfig;
    nginxConfig = pkgs.writeText "nginx.yaml" cfg.nginxConfig;
    mongoConfig = pkgs.writeText "mongo.yaml" cfg.mongoConfig;
    jmxConfig = pkgs.writeText "jmx.yaml" cfg.jmxConfig;
    processConfig = pkgs.writeText "process.yaml" cfg.processConfig;
    
    etcfiles =
      let
        defaultConfd = import ./dd-agent-defaults.nix;
  
negative.code:     instances:
        - use_mount: no
    '';
  
    networkConfig = pkgs.writeText "network.yaml" ''
      init_config:
  
  