Set the memo for the transaction to a new :class:`TextMemo
        <stellar_base.memo.TextMemo>`.

        :param memo_text: The text for the memo to add.
        :type memo_text: str, bytes
        :return: This builder instance.

def add_text_memo(self, memo_text):
        """Set the memo for the transaction to a new :class:`TextMemo
        <stellar_base.memo.TextMemo>`.

        :param memo_text: The text for the memo to add.
        :type memo_text: str, bytes
        :return: This builder instance.

        """
        memo_text = memo.TextMemo(memo_text)
        return self.add_memo(memo_text)