Questione giuridica chiave
Whether the extraordinary constitutional appeal was unavailable because an ordinary public-law appeal lay against the refusal to renew the residence permit.
Decisione estratta
An ordinary public-law appeal was available, so the subsidiary constitutional appeal did not lie; the filing was treated as a public-law appeal.
Motivazione estratta
Because the appellant asserted a plausible entitlement to renewal under Art. 50 AuG, the exclusion of Art. 83 lit. c no. 2 BGG did not apply at the admissibility stage.