- Increase the level of docs around why the persistence
objects exist and what they are used for and how an
engine interacts with persistence objects to accomplish
the wider goals.
- Pass backend conf as arg, not kwarg and to match with the
other fetch/load functions allow for providing a kwargs
which can be used for backend specific params.
Change-Id: Ia83e63196bcfcc966f68212f84f79a1e9f18e8bc
7277a73f8c