[MAINTAIN] orbax-checkpoint API does not expose user to Preservation Policy #2166
Description
In CheckpointMangerOptions docstring, it is said that max_to_keep, keep_time_interval, etc are deprecated and users should use preservation_policy instead. See here
However, orbax/checkpoint/orbax/checkpoint/__init__.py file does not expose users to PreservationPolicy class.
This is probably an oversight. Hence, I am opening this issue.