Opinion of Advocate General Saugmandsgaard Øe delivered on 28 February 2019.#European Commission v Hellenic Republic.#Failure of a Member State to fulfil obligations — Article 258 TFEU — Article 49 TFEU — Directive 2006/123/EC — Article 15(2) and (3) — Directive 2005/36/EC — Articles 13, 14, 50 and Annex VII — Freedom of establishment — Recognition of professional qualifications — National rules on mediator training providers.#Case C-729/17.