- drupal_set_message($this->t('Saved the %label @entity-type.', ['%label' => $this->entity->label(), '@entity-type' => $this->entityType->getLowercaseLabel()]));
+ $this->messenger()->addStatus($this->t('Saved the %label @entity-type.', ['%label' => $this->entity->label(), '@entity-type' => $this->entityType->getLowercaseLabel()]));