Case C-540/19: Judgment of the Court (Third Chamber) of 17 September 2020 (request for a preliminary ruling from the Bundesgerichtshof — Germany) — WV v Landkreis Harburg (Reference for a preliminary ruling — Judicial cooperation in civil matters — Jurisdiction in matters relating to maintenance obligations — Regulation (EC) No 4/2009 — Article 3(b) — Court for the place where the maintenance creditor is habitually resident — Action for recovery brought by a public body subrogated to the claims of a maintenance creditor)