Specify GCS Object Version in apache_beam.io.gcp.gcsio

I would like to specify a generation when accessing a gcs object via the beam filesystem.
Via the cli with the gsutil command a specific version can be access by the following syntax.

gsutil cp gs://{bucket}/{object_path}#{generation} .

So the corresponding python code would look something like this

with apache_beam.io.filesystems.open("gs://{bucket}/{object_path}#{generation}") as f:
pass

Fortunately, the StorageObjectsGetRequest can already be passed a generation.
However, this is not done within the GcsDownloader.

I think when parsing the GCS path the generation should be extracted as well.