def METHOD_NAME(folder: Path) -> None:
    for file in {  # pylint:disable=use-sequence-for-iteration
        ".hidden_do_not_remove",
        "key_values.json",
        "f1.txt",
        "f2.txt",
        "f3.txt",
        "d1/f1.txt",
        "d1/f2.txt",
        "d1/f3.txt",
        "d1/sd1/f1.txt",
        "d1/sd1/f2.txt",
        "d1/sd1/f3.txt",
    }:
        file_path = folder / file
        file_path.parent.mkdir(parents=True, exist_ok=True)
        file_path.write_text("test")