_: {
  keys = rec {
    mkKeymap = mode: key: action: desc: {
      inherit mode key action;
      options = {
        inherit desc;
        silent = true;
      };
    };

    mkKeymap' =
      mode: key: action:
      mkKeymap mode key action null;

    mkKeymapWithOpts =
      mode: key: action: desc: opts:
      (mkKeymap mode key action desc)
      // {
        options = opts;
      };

    mkKeymapWithOpts' =
      mode: key: action: opts:
      mkKeymapWithOpts mode key action null opts;
  };
}