Case T-257/18: Judgment of the General Court of 16 January 2020 — Iberpotash v Commission (State aid — Mining sector — Measure consisting (i) in the reduction of financial guarantees for the restoration of mining sites and (ii) in State investment for the restoration of mining sites ensuring a higher level of environmental protection — Decision declaring aid partly incompatible with the internal market and ordering its recovery — Concept of ‘aid’ — Advantage — Transfer of State resources — Selective nature — Legitimate expectations — Legal certainty — Calculation of the amount of the aid)