descriptionIdentity method
Returns a stable identity for metadata recovered from a stored handle.
The default implementation uses PersistentAccessHandleDescription.lastKnownPath. Backends whose identity is case-insensitive or not path-based should override this alongside entityIdentity. Returns null when the description carries no usable identity.
Implementation
@override
String? descriptionIdentity(
final PersistentAccessHandleDescription description,
) {
final lastKnownPath = description.lastKnownPath;
return lastKnownPath == null ? null : _identityForPath(lastKnownPath);
}