Joined Cases C-391/16, C-77/17 and C-78/17: Judgment of the Court (Grand Chamber) of 14 May 2019 (requests for a preliminary ruling from the Nejvyšší správní soud and from the Conseil du contentieux des étrangers — Czech Republic, Belgium) — M v Ministerstvo vnitra (C-391/16), X (C-77/17), X (C-78/17) v Commissaire général aux réfugiés et aux apatrides (Reference for a preliminary ruling — Area of freedom, security and justice — Asylum policy — International protection — Directive 2011/95/EU — Refugee status — Article 14(4) to (6) — Refusal to grant or revocation of refugee status in the event of danger to the security or the community of the host Member State — Validity — Article 18 of the Charter of Fundamental Rights of the European Union — Article 78(1) TFEU — Article 6(3) TEU — Geneva Convention)