Case C-193/18: Judgment of the Court (Fourth Chamber) of 13 June 2019 (request for a preliminary ruling from the Oberverwaltungsgericht für das Land Nordrhein-Westfalen — Germany) — Google LLC v Bundesrepublik Deutschland (Reference for a preliminary ruling — Electronic communications networks and services — Directive 2002/21/EC — Article 2(c) — Concept of ‘electronic communications service’ — Conveyance of signals — Web-based email service — Gmail service)