Case T-365/16: Judgment of the General Court of 28 November 2019 — Portigon v SRB (Economic and Monetary Union — Banking union — Single Resolution Mechanism for credit institutions and certain investment firms (SRM) — Single Resolution Fund (SRF) — Decision of the SRB on the 2016 ex-ante contributions — Action for annulment — Direct and individual concern — Admissibility — Essential procedural requirements — Authentication of the decision — Procedure for the adoption of the decision — Obligation to state reasons)