getLatestSnapshotMetadata abstract method
SessionStore.getSnapshot by sessionId (the session's latest leaf)
without the state: the same resolution, the same null-if-none contract,
and a row with state null. The resolved sessionId is carried on the
returned row even for a row that stored it only under state.
Implementation
Future<SessionSnapshot?> getLatestSnapshotMetadata(
String sessionId, {
Map<String, dynamic>? context,
});