Case T-664/14: Judgment of the General Court of 7 December 2018 — Belgium v Commission (State Aid — Aid implemented by Belgium for the benefit of financial cooperatives in the ARCO Group — Guarantee scheme protecting the shares held by individual members of those cooperatives — Decision declaring the aid incompatible with the internal market and prohibiting the payment of guaranteed amounts to individual members — Subject matter of the dispute — Recovery — Proportionality)