Case T-254/17: Judgment of the General Court of 5 October 2020 — Intermarché Casino Achats v Commission (Competition — Cartels — Administrative procedure — Decision ordering an inspection — Plea of illegality of Article 20 of Regulation (EC) No 1/2003 — Right to an effective remedy — Equality of arms — Obligation to state reasons — Right to inviolability of the home — Reasonable grounds — Evidence of participation in the suspected infringements — Proportionality)