def METHOD_NAME(self) -> Awaitable[float]:
    async def awaitable():
        reg_mtime = await aiofiles.os.path.getmtime(self._corp.get_confpath())
        data_path = self._corp.get_conf('PATH')
        data_dir = os.path.dirname(data_path) if data_path.endswith('/') else data_path
        data_mtime = await aiofiles.os.path.getmtime(data_dir)
        return max(reg_mtime, data_mtime)
    return awaitable()