Case T-131/20: Judgment of the General Court of 2 September 2020 — IR v Commission (Civil service — Officials — Rights and obligations of officials — Secondment in the interests of the service — Article 37, first paragraph, heading (a), first indent, of the Staff Regulations — Article 38 of the Staff Regulations — Refusal to extend a secondment — Duty to have regard for the welfare of officials — Rights of the defence)