Case C-429/19: Judgment of the Court (Ninth Chamber) of 4 June 2020 (request for a preliminary ruling from the Oberlandesgericht Koblenz — Germany) — Remondis GmbH v Abfallzweckverband Rhein-Mosel-Eifel (Reference for a preliminary ruling — Public procurement — Directive 2014/24/EU — Article 12(4) — Scope — Public contracts between entities within the public sector — Definition of ‘cooperation’ — None)