docs: def download_source(version):
          """
          Download Spark version. Uses same name as release tag without the leading 'v'.
          :param version: Version number to download.
          :return: None
          """
          local_filename = 'v{}.zip'.format(Spark.svm_version_path(version))
          Spark.download(Spark.spark_versions()['v{}'.format(version)], local_filename)