Order of the General Court (Ninth Chamber, Extended Composition) of 20 December 2021.#Heikki Niemelä and Others v European Central Bank.#Action for annulment – Economic and monetary policy – Prudential supervision of credit institutions – Specific supervisory tasks assigned to the ECB – Decision to withdraw a credit institution’s authorisation – Replacement of the contested measure in the course of the proceedings – Action which has become devoid of purpose – Loss of interest in bringing proceedings – No need to adjudicate – Action for damages – Manifest inadmissibility.#Case T-321/17.