Case C-212/20: Judgment of the Court (Seventh Chamber) of 18 November 2021 (request for a preliminary ruling from the Sąd Rejonowy dla Warszawy-Woli w Warszawie — Poland) — M.P., B.P. v ‘A.’ prowadzący działalność za pośrednictwem ‘A.’ S.A. (Reference for a preliminary ruling — Consumer protection — Directive 93/13/EEC — Unfair terms in consumer contracts — Mortgage loan agreement indexed to a foreign currency — Contractual term relating to the buying and selling rates of a foreign currency — Requirement of intelligibility and transparency — Powers of the national court)