Case C-869/19: Judgment of the Court (Grand Chamber) of 17 May 2022 (request for a preliminary ruling from the Tribunal Supremo — Spain) — L v Unicaja Banco SA, formerly Banco de Caja España de Inversiones, Salamanca y Soria S.A.U. (Reference for a preliminary ruling — Directive 93/13/EEC — Unfair terms in consumer contracts — Principle of equivalence — Principle of effectiveness — Mortgage agreement — Unfairness of the ‘floor clause’ in the agreement — National rules concerning the judicial appeal procedure — Limitation of the temporal effects of the declaration that an unfair term is void — Restitution — Power of review by the national appeal court of its own motion)