Case C-298/18: Judgment of the Court (Fourth Chamber) of 27 February 2020 (request for a preliminary ruling from the Arbeitsgericht Cottbus — Kammern Senftenberg — Germany) — Reiner Grafe, Jürgen Pohle v Südbrandenburger Nahverkehrs GmbH, OSL Bus GmbH (Reference for a preliminary ruling — Directive 2001/23/EC — Article 1(1) — Transfer of an undertaking — Safeguarding of employees’ rights — Operation of bus routes — Re-employment of the staff — Operating resources not taken over — Grounds)