text: public virtual DescribeSecurityGroupsResponse DescribeSecurityGroups(DescribeSecurityGroupsRequest request){var options = new InvokeOptions();options.RequestMarshaller = DescribeSecurityGroupsRequestMarshaller.Instance;options.ResponseUnmarshaller = DescribeSecurityGroupsResponseUnmarshaller.Instance;return Invoke<DescribeSecurityGroupsResponse>(request, options);}