How to use the azure-mgmt-rdbms.azure.mgmt.rdbms.postgresql.models function in azure-mgmt-rdbms

request = self._client.get(url, query_parameters, header_parameters)
            response = self._client.send(request, stream=False, **operation_config)

            if response.status_code not in [200]:
                exp = CloudError(response)
                exp.request_id = response.headers.get('x-ms-request-id')
                raise exp

            return response

        # Deserialize response
        deserialized = models.FirewallRulePaged(internal_paging, self._deserialize.dependencies)

        if raw:
            header_dict = {}
            client_raw_response = models.FirewallRulePaged(internal_paging, self._deserialize.dependencies, header_dict)
            return client_raw_response

        return deserialized
    list_by_server.metadata = {'url': '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DBforPostgreSQL/servers/{serverName}/firewallRules'}

if self.config.accept_language is not None:
                header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')

            # Construct and send request
            request = self._client.get(url, query_parameters, header_parameters)
            response = self._client.send(request, stream=False, **operation_config)

            if response.status_code not in [200]:
                exp = CloudError(response)
                exp.request_id = response.headers.get('x-ms-request-id')
                raise exp

            return response

        # Deserialize response
        deserialized = models.LogFilePaged(internal_paging, self._deserialize.dependencies)

        if raw:
            header_dict = {}
            client_raw_response = models.LogFilePaged(internal_paging, self._deserialize.dependencies, header_dict)
            return client_raw_response

        return deserialized
    list_by_server.metadata = {'url': '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DBforPostgreSQL/servers/{serverName}/logFiles'}

request = self._client.get(url, query_parameters, header_parameters)
            response = self._client.send(request, stream=False, **operation_config)

            if response.status_code not in [200]:
                exp = CloudError(response)
                exp.request_id = response.headers.get('x-ms-request-id')
                raise exp

            return response

        # Deserialize response
        deserialized = models.PerformanceTierPropertiesPaged(internal_paging, self._deserialize.dependencies)

        if raw:
            header_dict = {}
            client_raw_response = models.PerformanceTierPropertiesPaged(internal_paging, self._deserialize.dependencies, header_dict)
            return client_raw_response

        return deserialized
    list.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.DBforPostgreSQL/locations/{locationName}/performanceTiers'}

def _create_or_update_initial(
            self, resource_group_name, server_name, database_name, charset=None, collation=None, custom_headers=None, raw=False, **operation_config):
        parameters = models.Database(charset=charset, collation=collation)

        # Construct URL
        url = self.create_or_update.metadata['url']
        path_format_arguments = {
            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str'),
            'resourceGroupName': self._serialize.url("resource_group_name", resource_group_name, 'str'),
            'serverName': self._serialize.url("server_name", server_name, 'str'),
            'databaseName': self._serialize.url("database_name", database_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

request = self._client.get(url, query_parameters, header_parameters)
            response = self._client.send(request, stream=False, **operation_config)

            if response.status_code not in [200]:
                exp = CloudError(response)
                exp.request_id = response.headers.get('x-ms-request-id')
                raise exp

            return response

        # Deserialize response
        deserialized = models.ConfigurationPaged(internal_paging, self._deserialize.dependencies)

        if raw:
            header_dict = {}
            client_raw_response = models.ConfigurationPaged(internal_paging, self._deserialize.dependencies, header_dict)
            return client_raw_response

        return deserialized
    list_by_server.metadata = {'url': '/subscriptions/{subscriptionId}/resourceGroups/{resourceGroupName}/providers/Microsoft.DBforPostgreSQL/servers/{serverName}/configurations'}

if self.config.accept_language is not None:
                header_parameters['accept-language'] = self._serialize.header("self.config.accept_language", self.config.accept_language, 'str')

            # Construct and send request
            request = self._client.get(url, query_parameters, header_parameters)
            response = self._client.send(request, stream=False, **operation_config)

            if response.status_code not in [200]:
                exp = CloudError(response)
                exp.request_id = response.headers.get('x-ms-request-id')
                raise exp

            return response

        # Deserialize response
        deserialized = models.PerformanceTierPropertiesPaged(internal_paging, self._deserialize.dependencies)

        if raw:
            header_dict = {}
            client_raw_response = models.PerformanceTierPropertiesPaged(internal_paging, self._deserialize.dependencies, header_dict)
            return client_raw_response

        return deserialized
    list.metadata = {'url': '/subscriptions/{subscriptionId}/providers/Microsoft.DBforPostgreSQL/locations/{locationName}/performanceTiers'}

def _create_or_update_initial(
            self, resource_group_name, server_name, firewall_rule_name, start_ip_address, end_ip_address, custom_headers=None, raw=False, **operation_config):
        parameters = models.FirewallRule(start_ip_address=start_ip_address, end_ip_address=end_ip_address)

        # Construct URL
        url = self.create_or_update.metadata['url']
        path_format_arguments = {
            'subscriptionId': self._serialize.url("self.config.subscription_id", self.config.subscription_id, 'str'),
            'resourceGroupName': self._serialize.url("resource_group_name", resource_group_name, 'str'),
            'serverName': self._serialize.url("server_name", server_name, 'str'),
            'firewallRuleName': self._serialize.url("firewall_rule_name", firewall_rule_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