Case C-578/17: Judgment of the Court (Fourth Chamber) of 27 March 2019 (request for a preliminary ruling from the Korkein hallinto-oikeus — Finland) — proceedings brought by Oy Hartwall Ab (Reference for a preliminary ruling — Approximation of laws — Trade marks — Directive 2008/95/EC — Articles 2 and 3(1)(b) — Refusal to register or invalidity — Assessment of distinctive character by reference to the actual situation — Classification of a trade mark — Effect — Colour mark or figurative mark — Graphic representation of a mark submitted as a figurative mark — Conditions for registration — Insufficiently clear and precise graphic representation)