Joined Cases C-133/19, C-136/19 and C-137/19: Judgment of the Court (Third Chamber) of 16 July 2020 (requests for a preliminary ruling from the Conseil d’État — Belgium) — B. M. M. (C-133/19 and C-136/19), B. S. (C-133/19), B. M. (C-136/19), B. M. O. (C-137/19) v État belge (Reference for a preliminary ruling — Area of freedom, security and justice — Immigration policy — Right to family reunification — Directive 2003/86/EC — Article 4(1) — Concept of a ‘minor child’ — Article 24(2) of the Charter of Fundamental Rights of the European Union — Best interests of the child — Article 47 of the Charter of Fundamental Rights — Right to an effective remedy — Children of the sponsor who have reached majority during the decision-making procedure or court proceedings against the decision refusing the family reunification application)