How to use the azure-mgmt-storage.azure.mgmt.storage.v2018_02_01.models.ImmutabilityPolicy function in azure-mgmt-storage

period for the blobs in the container since the policy creation, in
         days.
        :type immutability_period_since_creation_in_days: int
        :param dict custom_headers: headers that will be added to the request
        :param bool raw: returns the direct response alongside the
         deserialized response
        :param operation_config: :ref:`Operation configuration
         overrides`.
        :return: ImmutabilityPolicy or ClientRawResponse if raw=true
        :rtype: ~azure.mgmt.storage.v2018_02_01.models.ImmutabilityPolicy or
         ~msrest.pipeline.ClientRawResponse
        :raises: :class:`CloudError`
        """
        parameters = None
        if immutability_period_since_creation_in_days is not None:
            parameters = models.ImmutabilityPolicy(immutability_period_since_creation_in_days=immutability_period_since_creation_in_days)

        # Construct URL
        url = self.extend_immutability_policy.metadata['url']
        path_format_arguments = {
            'resourceGroupName': self._serialize.url("resource_group_name", resource_group_name, 'str', max_length=90, min_length=1, pattern=r'^[-\w\._\(\)]+$'),
            'accountName': self._serialize.url("account_name", account_name, 'str', max_length=24, min_length=3),
            'containerName': self._serialize.url("container_name", container_name, 'str', max_length=63, min_length=3),
            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str', min_length=1)
        }
        url = self._client.format_url(url, **path_format_arguments)

        # Construct parameters
        query_parameters = {}
        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str', min_length=1)

        # Construct headers

only if the immutability policy already exists. If omitted, this
         operation will always be applied.
        :type if_match: str
        :param dict custom_headers: headers that will be added to the request
        :param bool raw: returns the direct response alongside the
         deserialized response
        :param operation_config: :ref:`Operation configuration
         overrides`.
        :return: ImmutabilityPolicy or ClientRawResponse if raw=true
        :rtype: ~azure.mgmt.storage.v2018_02_01.models.ImmutabilityPolicy or
         ~msrest.pipeline.ClientRawResponse
        :raises: :class:`CloudError`
        """
        parameters = None
        if immutability_period_since_creation_in_days is not None:
            parameters = models.ImmutabilityPolicy(immutability_period_since_creation_in_days=immutability_period_since_creation_in_days)

        # Construct URL
        url = self.create_or_update_immutability_policy.metadata['url']
        path_format_arguments = {
            'resourceGroupName': self._serialize.url("resource_group_name", resource_group_name, 'str', max_length=90, min_length=1, pattern=r'^[-\w\._\(\)]+$'),
            'accountName': self._serialize.url("account_name", account_name, 'str', max_length=24, min_length=3),
            'containerName': self._serialize.url("container_name", container_name, 'str', max_length=63, min_length=3),
            'immutabilityPolicyName': self._serialize.url("self.immutability_policy_name", self.immutability_policy_name, 'str'),
            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str', min_length=1)
        }
        url = self._client.format_url(url, **path_format_arguments)

        # Construct parameters
        query_parameters = {}
        query_parameters['api-version'] = self._serialize.query("self.api_version", self.api_version, 'str', min_length=1)