getCached method
Returns the cached OfflineSyncSpace for the given space ID.
Implementation
OfflineSyncSpace getCached(UuidValue uuidSpaceId) =>
_instances[uuidSpaceId] ??
(throw StateError(
'Space $uuidSpaceId not found in cache. '
'Ensure OfflineSyncSpaceManager.getOrCreate() is called before getCached().',
));