Defined in github.com/aws/aws-sdk-go/service/ec2/api.go
Resets an attribute of an instance to its default value. To reset the kernel or ramdisk, the instance must be in a stopped state. To reset the sourceDestCheck, the instance can be either running or stopped.
The sourceDestCheck attribute controls whether source/destination checking is enabled. The default value is true, which means checking is enabled. This value must be false for a NAT instance to perform NAT. For more information, see NAT Instances (http://docs.aws.amazon.com/AmazonVPC/latest/UserGuide/VPC_NAT_Instance.html) in the Amazon Virtual Private Cloud User Guide.