Joined Cases T-98/16, T 196/16 and T-198/16: Judgment of the General Court of 19 March 2019 — Italy and Others v Commission (State aid — Intervention by a consortium governed by private law of banks in favour of one of its members — Intervention authorised by the Central Bank of the Member State — Decision declaring the aid incompatible with the internal market — Action for annulment — Definition of State aid — Whether imputable to the State — State resources)