Case C-229/14: Judgment of the Court (First Chamber) of 9 July 2015 (request for a preliminary ruling from the Arbeitsgericht Verden (Germany)) — Ender Balkaya v Kiesel Abbruch- und Recycling Technik GmbH (Reference for a preliminary ruling — Directive 98/59/EC — Article 1(1)(a) — Collective redundancies — Concept of ‘worker’ — Member of the board of directors of a limited liability company — Person working under a scheme for training and reintegration into the labour market and benefitting from a public training grant but not receiving remuneration from the employer)