Joined Cases T-186/13, T-190/13 and T-193/13: Judgment of the General Court of 30 June 2015 — Netherlands and Others v Commission (State aid — Sale of land — Aid granted to Schouten-de Jong Bouwfonds by a public-private partnership set up by the Municipality of Leidschendam-Voorburg — Reduction in the sale price of land and retroactive exemption from payment of the fees payable for its exploitation and quality — Decision declaring the aid incompatible with the common market and ordering its recovery — Concept of aid — Private-investor test — Assessment of all factors relevant to the transaction at issue and its context)