def get_welcome(self, connId='default'):
        """
        Returns wlecome message of FTP server.
        Parameters:
        - connId(optional) - connection identifier. By default equals 'default'
        """
        thisConn = self.__getConnection(connId)
        outputMsg = ""
        try:
            outputMsg += thisConn.getwelcome()
        except ftplib.all_errors as e:
            raise FtpLibraryError(str(e))
        if self.printOutput:
            logger.info(outputMsg)
        return outputMsg