UpgradableVersions are registered to a Datastore that mixes-in VersioningSupport.
UpgradableVersions are registered to a Datastore that mixes-in VersioningSupport. An UpgradableVersion represents a
specific version number of the database that can be upgraded to. By default the database starts at zero an
UpgradableVersion must be registered for each incrementing version. The responsibility of each UpgradableVersion is
to upgrade from one version behind to this version.
UpgradableVersions are registered to a Datastore that mixes-in VersioningSupport. An UpgradableVersion represents a specific version number of the database that can be upgraded to. By default the database starts at zero an UpgradableVersion must be registered for each incrementing version. The responsibility of each UpgradableVersion is to upgrade from one version behind to this version.