Case C-673/17: Judgment of the Court (Grand Chamber) of 1 October 2019 (request for a preliminary ruling from the Bundesgerichtshof — Germany) — Bundesverband der Verbraucherzentralen und Verbraucherverbände — Verbraucherzentrale Bundesverband eV v Planet49 GmbH (Reference for a preliminary ruling — Directive 95/46/EC — Directive 2002/58/EC — Regulation (EU) 2016/679 — Processing of personal data and protection of privacy in the electronic communications sector — Cookies — Concept of consent of the data subject — Declaration of consent by means of a pre-ticked checkbox)