Question juridique clé
Whether the cantonal decision admitting third-party notice was an incident decision open to federal appeal and whether Art. 93 LTF was satisfied.
Solution extraite
A decision admitting third-party notice is an incidental decision; the appeal in civil matters was in principle available, while the subsidiary constitutional appeal was excluded.
Motifs extraits
Such a decision only obliges the insurer to participate in the proceedings and does not end them. Because the value in dispute exceeded the statutory threshold, the civil appeal was available; the constitutional appeal was subsidiary.