{ lib, myLib, ... }:
with lib;
rec {
  mergeAttrsRecursive =
    a: b:
    foldAttrs
      (
        item: acc:
        if (isNull acc) then
          item
        else if (isList item) then
          if isList acc then acc ++ item else [ acc ] ++ item
        else if (isString item) then
          acc + item
        else if (isAttrs item) then
          mergeAttrsRecursive acc item
        else
          item
      )
      null
      [
        b
        a
      ];
}