Case C-564/13 P: Judgment of the Court (Fifth Chamber) of 26 February 2015 — Planet AE Anonimi Etairia Parokhis Simvouleftikon Ipiresion v European Commission (Appeals — Article 340, first paragraph, TFEU — Contractual liability of the European Union — Article 272 TFEU — Arbitration clause — Sixth framework programme for research, technological development and demonstration activities — Contracts relating to the Ontogov, FIT and RACWeb projects — Eligible costs and amounts advanced by the Commission — Declaratory action — No vested and current interest in bringing proceedings)