src/Mail/TranslatorAwareMessage.php
public function setTranslator(TranslatorInterface $translator = null, $textDomain = null)
    {
        if ($translator) {
            $this->translator = $translator;
        }
        $this->setTranslatorTextDomain($textDomain);
        return $this;
    }
public function setTranslator(TranslatorInterface $translator = null, $textDomain = null)
    {
        if ($translator) {
            $this->translator = $translator;
        }
        $this->setTranslatorTextDomain($textDomain);
        return $this;
    }
/* (non-PHPdoc)
@see \Zend\I18n\Translator\TranslatorAwareInterface::setTranslator()