def METHOD_NAME(gs_bucket_name: str, r2_bucket_name: str) -> None:
    """Creates a one-time transfer from Google Cloud Storage to Amazon S3.
     Args:
      gs_bucket_name: str; Name of the Google Cloud Storage Bucket
      r2_bucket_name: str; Name of the Cloudflare R2 Bucket
    """
    raise NotImplementedError('Moving data directly from clouds to R2 is '
                              'currently not supported. Please specify '
                              'a local source for the storage object.')