Case T-778/17: Judgment of the General Court of 24 October 2019 — Autostrada Wielkopolska v Commission (State aid — Toll-motorway concession — Law providing for an exemption from tolls for certain vehicles — Compensation granted to the concession holder by the Member State for loss of revenue — Shadow toll — Decision declaring aid incompatible with the internal market and ordering its recovery — Procedural rights of the interested parties — Commission’s obligation to exercise particular vigilance — Concept of State aid — Advantage — Improvement of the concessionaire’s expected financial situation — Criterion of the private operator in a market economy — Article 107(3)(a) TFEU — Regional State aid)