Case T-819/14: Order of the General Court of 20 April 2016 — Mezhdunaroden tsentar za izsledvane na maltsinstvata i kulturnite vzaimodeystvia v Commission (Action for annulment — Contract concerning Union financial assistance in favour of a project seeking to improve the effectiveness of laws combatting discrimination (GendeRace project) — Debit note — Measure not open to challenge — Measure which is part of a purely contractual context from which it is inseparable — Inadmissibility)