How to use the azure-storage-queue.azure.storage.queue._error._ERROR_MESSAGE_NOT_BASE64 function in azure-storage-queue

def text_base64decode(data):
        '''
        Base64 decode to unicode text.
        
        :param str data: String data to decode to unicode.
        :return: Base64 decoded string.
        :rtype: str
        '''
        try:
            return b64decode(data.encode('utf-8')).decode('utf-8')
        except (ValueError, TypeError):
            # ValueError for Python 3, TypeError for Python 2
            raise ValueError(_ERROR_MESSAGE_NOT_BASE64)