async def download_file(self, file_path: base.String,
                            destination: Optional[base.InputFile] = None,
                            timeout: Optional[base.Integer] = sentinel,
                            chunk_size: Optional[base.Integer] = 65536,
                            seek: Optional[base.Boolean] = True) -> Union[io.BytesIO, io.FileIO]:
        """
        Download file by file_path to destination

        if You want to automatically create destination (:class:`io.BytesIO`) use default
        value of destination and handle result of this method.

        :param file_path: file path on telegram server (You can get it from :obj:`aiogram.types.File`)
        :type file_path: :obj:`str`
        :param destination: filename or instance of :class:`io.IOBase`. For e. g. :class:`io.BytesIO`
        :param timeout: Integer
        :param chunk_size: Integer
        :param seek: Boolean - go to start of file when downloading is finished.
        :return: destination
        """
        if destination is None:
            destination = io.BytesIO()

        url = api.Methods.file_url(token=self.__token, path=file_path)

        dest = destination if isinstance(destination, io.IOBase) else open(destination, 'wb')
        async with self.session.get(url, timeout=timeout, proxy=self.proxy, proxy_auth=self.proxy_auth) as response:
            while True:
                chunk = await response.content.read(chunk_size)
                if not chunk:
                    break
                dest.write(chunk)
                dest.flush()
        if seek:
            dest.seek(0)
        return dest
Download file by file_path to destination

        if You want to automatically create destination (:class:`io.BytesIO`) use default
        value of destination and handle result of this method.

        :param file_path: file path on telegram server (You can get it from :obj:`aiogram.types.File`)
        :type file_path: :obj:`str`
        :param destination: filename or instance of :class:`io.IOBase`. For e. g. :class:`io.BytesIO`
        :param timeout: Integer
        :param chunk_size: Integer
        :param seek: Boolean - go to start of file when downloading is finished.
        :return: destination