How to use the azure-storage-queue.azure.storage.queue.models.QueueMessageFormat function in azure-storage-queue

super(QueueService, self).__init__(service_params)

        if self.account_key:
            self.authentication = _StorageSharedKeyAuthentication(
                self.account_name,
                self.account_key,
                self.is_emulated
            )
        elif self.sas_token:
            self.authentication = _StorageSASAuthentication(self.sas_token)
        elif self.token_credential:
            self.authentication = self.token_credential
        else:
            raise ValueError(_ERROR_STORAGE_MISSING_INFO)

        self.encode_function = QueueMessageFormat.text_xmlencode
        self.decode_function = QueueMessageFormat.text_xmldecode
        self.key_encryption_key = None
        self.key_resolver_function = None
        self.require_encryption = False
        self._X_MS_VERSION = X_MS_VERSION
        self._update_user_agent_string(package_version)

if self.account_key:
            self.authentication = _StorageSharedKeyAuthentication(
                self.account_name,
                self.account_key,
                self.is_emulated
            )
        elif self.sas_token:
            self.authentication = _StorageSASAuthentication(self.sas_token)
        elif self.token_credential:
            self.authentication = self.token_credential
        else:
            raise ValueError(_ERROR_STORAGE_MISSING_INFO)

        self.encode_function = QueueMessageFormat.text_xmlencode
        self.decode_function = QueueMessageFormat.text_xmldecode
        self.key_encryption_key = None
        self.key_resolver_function = None
        self.require_encryption = False
        self._X_MS_VERSION = X_MS_VERSION
        self._update_user_agent_string(package_version)