lib.attrsets.foldlAttrs: Make stricter

    );

   /*

    Like builtins.foldl' but for attribute sets.

    Like [`lib.lists.foldl'`](#function-library-lib.lists.foldl-prime) but for attribute sets.

    Iterates over every name-value pair in the given attribute set.

    The result of the callback function is often called `acc` for accumulator. It is passed between callbacks from left to right and the final `acc` is the return value of `foldlAttrs`.

        123

      foldlAttrs

        (_: _: v: v)

        (throw "initial accumulator not needed")

        { z = 3; a = 2; };

        (acc: _: _: acc)

        3

        { z = throw "value not needed"; a = throw "value not needed"; };

      ->

        3

      foldlAttrs :: ( a -> String -> b -> a ) -> a -> { ... :: b } -> a

  */

  foldlAttrs = f: init: set:

    builtins.foldl'

    foldl'

      (acc: name: f acc name set.${name})

      init

      (attrNames set);

      # should just return the initial value

      emptySet = foldlAttrs (throw "function not needed") 123 { };

      # should just evaluate to the last value

      accNotNeeded = foldlAttrs (_acc: _name: v: v) (throw "accumulator not needed") { z = 3; a = 2; };

      valuesNotNeeded = foldlAttrs (acc: _name: _v: acc) 3 { z = throw "value z not needed"; a = throw "value a not needed"; };

      # the accumulator doesnt have to be an attrset it can be as trivial as being just a number or string

      trivialAcc = foldlAttrs (acc: _name: v: acc * 10 + v) 1 { z = 1; a = 2; };

    };

        names = [ "bar" "foo" ];

      };

      emptySet = 123;

      accNotNeeded = 3;

      valuesNotNeeded = 3;

      trivialAcc = 121;

    };

  };

- [`lib.lists.foldl'`](https://nixos.org/manual/nixpkgs/stable#function-library-lib.lists.foldl-prime) now always evaluates the initial accumulator argument first.

  If you depend on the lazier behavior, consider using [`lib.lists.foldl`](https://nixos.org/manual/nixpkgs/stable#function-library-lib.lists.foldl) or [`builtins.foldl'`](https://nixos.org/manual/nix/stable/language/builtins.html#builtins-foldl') instead.

- [`lib.attrsets.foldlAttrs`](https://nixos.org/manual/nixpkgs/stable#function-library-lib.attrsets.foldlAttrs) now always evaluates the initial accumulator argument first.

- `rome` was removed because it is no longer maintained and is succeeded by `biome`.

- The `services.mtr-exporter.target` has been removed in favor of `services.mtr-exporter.jobs` which allows specifying multiple targets.