public function messageId($message = null)
    {
        deprecationWarning('Email::messageId() is deprecated. Use Email::setMessageId() or Email::getMessageId() instead.');

        if ($message === null) {
            return $this->getMessageId();
        }

        return $this->setMessageId($message);
    }
public function messageId($message = null)
    {
        deprecationWarning('Email::messageId() is deprecated. Use Email::setMessageId() or Email::getMessageId() instead.');

        if ($message === null) {
            return $this->getMessageId();
        }

        return $this->setMessageId($message);
    }
public function messageId ( $ message = null ) { deprecationWarning ( 'Email::messageId() is deprecated. Use Email::setMessageId() or Email::getMessageId() instead.' ) ; if ( $ message === null ) { return $ this -> getMessageId ( ) ; } return $ this -> setMessageId ( $ message ) ; }
Message-ID

@deprecated 3.4.0 Use setMessageId()/getMessageId() instead.
@param bool|string|null $message True to generate a new Message-ID, False to ignore (not send in email), String to set as Message-ID
@return bool|string|$this
@throws \InvalidArgumentException
Message - ID