Key legal question
Whether the public law appeal was admissible against the cantonal judgment on appeal admissibility.
Extracted holding
The public law appeal was admissible only insofar as the challenged ruling concerned the application of autonomous cantonal procedural law; it was inadmissible against the first-instance order.
Extracted reasoning
The cantonal court decided only the availability of an appeal under Geneva procedural law, not the federal merits under Art. 42 CC. That made public law appeal the proper federal remedy for reviewing the cantonal-law question.