Case C-56/18 P: Judgment of the Court (Fifth Chamber) of 11 March 2020 — European Commission v Gmina Miasto Gdynia, Port Lotniczy Gdynia Kosakowo sp. z o.o, Republic of Poland (Appeal — State aid — Article 108(2) TFEU — Investment aid — Operating aid — Airport infrastructure — Public funding by the municipalities of Gdynia and Kosakowo for setting up the Gdynia-Kosakowo Airport — Decision of the European Commission — Aid incompatible with the internal market — Order for recovery of the aid — Annulment by the General Court of the European Union — Essential procedural requirement — Procedural rights of the interested parties)