This is called each time the writer completed a commit. /// This gives the policy a chance to remove old commit points /// with each commit.
/// ///The policy may now choose to delete old commit points
/// by calling method
This method is only called when
Note: the last CommitPoint is the most recent one, /// i.e. the "front index state". Be careful not to delete it, /// unless you know for sure what you are doing, and unless /// you can afford to lose the index content while doing that.
///