This type (as well as TarsumBackup), was used for the experimental --stream
support for the classic builder. This feature was removed in commit
6ca3ec88ae, which also removed uses of
the CachableSource type.
As far as I could find, there's no external consumers of these types,
but let's deprecated it, to give potential users a heads-up that it
will be removed.
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
(cherry picked from commit 37d4b0bee9)
Signed-off-by: Sebastiaan van Stijn <github@gone.nl>
ec8ec9056c