Case C-406/21: Judgment of the Court (Tenth Chamber) of 20 October 2022 (request for a preliminary ruling from the Korkein oikeus — Finland) — A Oy v B Ky, Joint heirs of C (Reference for a preliminary ruling — Combating late payment in commercial transactions — Directive 2011/7/EU — Article 12(4) — Temporal scope — Practice established before 16 March 2013 consisting in not recovering interest for late payment or compensation for recovery costs — Practice applied to individual orders placed on or after that date — Article 7(2) and (3) — Grossly unfair contractual terms and practices — Waiver freely agreed to)