Case C-218/19: Judgment of the Court (First Chamber) of 17 December 2020 (request for a preliminary ruling from the Cour de cassation — France) — Adina Onofrei v Conseil de l’ordre des avocats au barreau de Paris, Bâtonnier de l’ordre des avocats au barreau de Paris, Procureur général près la cour d’appel de Paris (Reference for a preliminary ruling — Free movement of persons — Freedom of establishment — Access to the profession of lawyer — Exemption from training and diploma requirements — Grant of the exemption — Conditions — National legislation providing for an exemption for category A civil servants and former category A civil servants or for persons treated as such with experience in the professional practice of national law, on national territory, in the national civil service of the Member State concerned or in an international organisation)