Kernrechtsfrage
Whether the court could consider the request to reunite the applicant also with the son's siblings.
Extrahierter Entscheid
The court did not enter into the request for the siblings because no application had been made before the migration authority and no cantonal decision existed on that point.
Extrahierte Begründung
The administrative dispute concerned only the reunification request for the son A.; without a prior application and decision, the alternative request was outside the scope of review.