Case C-131/18: Order of the Court (Tenth Chamber) of 11 April 2019 (request for a preliminary ruling from the Bundesgerichtshof — Germany) — Vanessa Gambietz v Erika Ziegler (Reference for a preliminary ruling — Law on undertakings — Combating late payment in commercial transactions — Directive 2011/7/EU — Article 6 — Compensation for recovery costs — Payment of a fixed sum and of reasonable compensation — Deduction of fixed sum from the costs of instructing a lawyer prior to bringing proceedings before a court)