Key legal question
Whether the complaint is admissible against the cantonal decision revoking the settlement permit, including the alleged hardship exception.
Extracted holding
The complaint is admissible in principle against the revocation decision, but not insofar as it seeks to invoke a serious personal hardship that is excluded from federal appeal.
Extracted reasoning
A public-law complaint lies against the final cantonal decision under the Federal Supreme Court Act, but the hardship argument falls within an excluded category under Art. 83 lit. c ch. 5 BGG.