Case C-181/19: Judgment of the Court (Grand Chamber) of 6 October 2020 (request for a preliminary ruling from the Landessozialgericht Nordrhein-Westfalen — Germany) — Jobcenter Krefeld — Widerspruchsstelle v JD (Reference for a preliminary ruling — Free movement of persons — Workers — Regulation (EU) No 492/2011 — Article 7(2) — Equal treatment — Social advantages — Article 10 — Children attending school — Directive 2004/38/EC — Article 24 — Social assistance — Regulation (EC) No 883/2004 — Article 4 — Article 70 — Special non-contributory cash benefits — Migrant worker with dependent children attending school in the host Member State)