Case C-6/22, M.B. and Others (Effects of the invalidation of a contract): Judgment of the Court (Sixth Chamber) of 16 March 2023 (request for a preliminary ruling from the Sąd Rejonowy dla Warszawy-Woli w Warszawie — Poland) — M.B., U.B., M.B. v X S.A. (Reference for a preliminary ruling — Consumer protection — Directive 93/13/EEC — Unfair terms in consumer contracts — Articles 6 and 7 — Effects of a declaration that a term is unfair — Mortgage loan agreement indexed to a foreign currency — Continued existence of the contract without unfair terms — Consumer’s wish to have the contract declared invalid — Application of the directive after the invalidation of the contract — Powers and obligations of the national court)