Case T-522/15: Judgment of the General Court of 11 July 2019 — CCPL and Others v Commission (Competition — Agreements, decisions and concerted practices — Retail food packaging market — Decision finding an infringement of Article 101 TFEU — Attributability of unlawful conduct — 2006 Guidelines on the method of setting fines — Value of sales — Ceiling of the fine — Proportionality — Equal treatment — Ability to pay)