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[Cinder] Odd Volume and Volume Snapshot Dependencies

Currently running python-openstackclient functional tests against an
openstack deployment. Ran into some odd functionality whilst
manipulating volumes and snapshots in openstack via cli and gui.

I create a volume, create a snapshot of that volume, and then create a
volume from that snapshot. I can't delete the snapshot until I delete the
volume that I spawned using that snapshot. I understand the dependency
of "can't delete a volume while a snapshot dependent on that volume is
deleted first" but why can't a volume snapshot be deleted when volumes
are spawned from it? Is this intentional? I am working with Cinder 3.27.

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