def save_game(self):
    save_file = open("saves/main_save.xml", "w+")

    level = self.save_level()
    self.tree.append(level)

    team = self.save_team()
    self.tree.append(team)

    # Store XML tree in file
    save_file.write(etree.tostring(self.tree, pretty_print=True, encoding="unicode"))

    save_file.close()

    def save_upload_file(
            self,
            file: UploadFile,
            save_dir_path: pathlib.Path,
            job_id: str,
            dt_string: str,
    ) -> pathlib.Path:
        """Save `file` under `save_dir_path`.
        Args:
            file (UploadFile): A file want to save.
            save_dir_path (pathlib.Path): A path to directory where file will be saved.
            job_id (str): A job id. This will used part of filename.
            dt_string (str): A datetime info. This will used part of filename.
        Return:
            pathlib.Path: A path where file is saved.
        """
        if not save_dir_path.exists():
            save_dir_path.mkdir(parents=True, exist_ok=True)

        save_path: Final = save_dir_path / f"{dt_string}_{job_id}_{file.filename}"

        try:
            with save_path.open("wb") as f:
                shutil.copyfileobj(file.file, f)
        finally:
            file.file.close()

        return save_path