Le Rêve de Zola Un roman sentimental ou une variante du roman naturaliste ?

In many ways, Zola’s Le Rêve is presented as a sentimental novel. Can this be compatible with the naturalist register of the Rougon-Macquart? The novel is fundamentally ambiguous: it seems the author sought to join two irreconcilable narrative ends together, favouring non-functional literariness over his naturalist leanings.