practical use of snapshots

[RubyWanKenobi]

Hi just would like to understand what the intention behind register_snapshot_definition was. If I understand it right a snapshot is something for a quick logical backup of the database like "I want to have a backup before I change something within the data". But currently I see no command within pgbackman available to restore such a snapshot. Is this something that is missing by your limited time or have I overseen this feature in the documentation ?