Case T-857/19: Judgment of the General Court of 28 October 2020 — Dehousse v Court of Justice of the European Union (Access to documents — Court of Justice of the European Union — Documents held by an institution in the exercise of its administrative functions — Article 266 TFEU — Decision adopted to give effect to a judgment of the General Court — Measures necessary to give effect to a judgment delivered in an action for annulment — Presumption of non-existence or non-possession of documents — Plausible explanations making it possible to determine the reasons for the non-existence or non-possession of documents — Obligation to state reasons — Retention of documentation — Principle of good administration)