The on-disk format of a store returned by openStore, or null when it is unknown (no consolidated metadata, or a store that did not come from openStore). Optional-sidecar probes use it to ask for ONE format's documents rather than guessing both.
null
openStore
The on-disk format of a store returned by openStore, or
nullwhen it is unknown (no consolidated metadata, or a store that did not come fromopenStore). Optional-sidecar probes use it to ask for ONE format's documents rather than guessing both.