Case C-247/17: Judgment of the Court (Grand Chamber) of 13 November 2018 (request for a preliminary ruling from the Korkein oikeus — Finland) — proceedings relating to the extradition of Denis Raugevicius (Reference for a preliminary ruling — European Union Citizenship — Articles 18 and 21 TFEU — Request to a Member State by a third country seeking extradition of an EU citizen who is a national of another Member State and who has exercised his right to free movement in the first Member State — Request made for the purpose of enforcing a custodial sentence and not for the purpose of prosecution — Prohibition on extradition applied only to own nationals — Restriction on free movement — Justification based on the prevention of impunity — Proportionality)