Case T-448/18: Judgment of the General Court of 29 September 2021 — Ryanair and Others v Commission (State aid — Agreements concluded by Kärntner Flughafen Betriebsgesellschaft with Ryanair and its subsidiaries Airport Marketing Services and Leading Verge.com — Airport services — Marketing services — Decision declaring the aid incompatible with the internal market and ordering its recovery — Concept of State aid — Whether imputable to the State — Advantage — Private investor test — Recovery — Article 41 of the Charter of Fundamental Rights — Right of access to the file — Right to be heard)