GetSystemTableSpanForRegion gets the span that contains the primary index span related to a given region.

IsMissingRegionEnumErr determines if a query hit an error because of a missing because of the region enum.

IsQueryTimeoutErr determines if a query timeout error was hit, specifically when checking for region liveness.

NewLivenessProber creates a new region liveness prober.

Prober used to determine the set of regions which are still alive.

LiveRegions are regions which are currently still avaialble, and not quarantined due to expiration.

UnavailableAtPhysicalRegions is map of regions (in physical representation).