Case C-694/19 P: Judgment of the Court (Ninth Chamber) of 15 April 2021 — Italmobiliare SpA, Sirap-Gema SpA, Sirap France SAS, Petruzalek GmbH, Petruzalek s.r.o., Petruzalek s.r.o. and Petruzalek kft v European Commission (Appeal — Competition — Agreements, decisions and concerted practices — Retail food packaging market — Attributability of unlawful conduct — Conditions for the granting of immunity — 2006 Guidelines on the method of setting fines — Sales value — Upper limit of the fine — Duration of the administrative procedure — Reasonable time — Ability to pay)