Kernrechtsfrage
Whether the public-law appeal against the cantonal interlocutory judgment was admissible
Extrahierter Entscheid
Yes. The cantonal ruling was separable and would conclusively determine the fate of the action, so a separate appeal was available.
Extrahierte Begründung
Because the lower court would be bound by the nullity finding and could only declare the action inadmissible, the decision effectively settled the case.