Case C-587/18 P: Judgment of the Court (Ninth Chamber) of 4 March 2020 — CSTP Azienda della Mobilità SpA v European Commission, Asstra Associazione Trasporti (Appeal — Competition — State aid — Undertaking operating bus route networks in the Regione Campania (Campania Region, Italy) — Compensation for public service obligations paid by the Italian authorities following a judgment of the Consiglio di Stato (Council of State, Italy) — European Commission decision declaring the aid measure unlawful and incompatible with the internal market)