Case T-592/16: Judgment of the General Court of 12 December 2019 — Feral v Committee of the Regions (Civil Service — Reform of the Staff Regulations and of the CEOS that entered into force on 1 January 2014 — Regulation (EU, Euratom) No 1023/2013 — Solidarity levy applicable from 1 January 2014 — Suspension of application of the method for updating remuneration for 2013 and 2014)