Questione giuridica chiave
Whether the appeal against the detention order was still live after the appellant left Switzerland.
Decisione estratta
The appeal had become moot and was struck from the docket.
Motivazione estratta
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.