Type Alias LogicalIndexSegments 

pub type LogicalIndexSegments = BTreeMap<String, Vec<CoverageIdentity>>;

Non-system logical index name -> its physical segments, ordered by UUID.

Whole segment metadata rather than UUIDs alone: operations such as Rewrite prune a segment’s fragment bitmap while keeping its UUID, so a UUID-only comparison would keep coverage for an index that no longer spans the same base fragments.

Aliased Type

pub struct LogicalIndexSegments { /* private fields */ }