Case C-848/19 P: Judgment of the Court (Grand Chamber) of 15 July 2021 — Federal Republic of Germany v Republic of Poland, European Commission, Republic of Latvia, Republic of Lithuania (Appeal — Article 194(1) TFEU — Principle of energy solidarity — Directive 2009/73/EC — Internal market in natural gas — Article 36(1) — Decision of the European Commission on review of the exemption of the OPAL pipeline from the requirements on third-party access and tariff regulation following a request by the German regulatory authority — Action for annulment)