How to use the azure-mgmt-security.azure.mgmt.security.models.Pricing function in azure-mgmt-security

:param pricing_name: name of the pricing configuration
        :type pricing_name: str
        :param pricing_tier: The pricing tier value. Possible values include:
         'Free', 'Standard'
        :type pricing_tier: str or ~azure.mgmt.security.models.PricingTier
        :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: Pricing or ClientRawResponse if raw=true
        :rtype: ~azure.mgmt.security.models.Pricing or
         ~msrest.pipeline.ClientRawResponse
        :raises: :class:`CloudError`
        """
        pricing = models.Pricing(pricing_tier=pricing_tier)

        # Construct URL
        url = self.update.metadata['url']
        path_format_arguments = {
            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str', pattern=r'^[0-9A-Fa-f]{8}-([0-9A-Fa-f]{4}-){3}[0-9A-Fa-f]{12}$'),
            'pricingName': self._serialize.url("pricing_name", pricing_name, 'str')
        }
        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')

        # Construct headers
        header_parameters = {}
        header_parameters['Accept'] = 'application/json'