Kernrechtsfrage
Whether the appeal against the detention order was still live after the appellant left Switzerland.
Extrahierter Entscheid
The appeal had become moot and was struck from the docket.
Extrahierte Begründung
The Service de la population informed the court that the appellant had departed Switzerland on 2017-03-22; the appeal against the detention order of 2017-02-21 therefore no longer had any object.