public Boolean isPrimaryIpv6() {
        return this.primaryIpv6;
    }
<p>
The primary IPv6 address of the network interface. When you enable an IPv6 GUA address to be a primary IPv6, the
first IPv6 GUA will be made the primary IPv6 address until the instance is terminated or the network interface is
detached. For more information about primary IPv6 addresses, see <a
href="https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_RunInstances.html">RunInstances</a>.
</p>

@return The primary IPv6 address of the network interface. When you enable an IPv6 GUA address to be a primary
        IPv6, the first IPv6 GUA will be made the primary IPv6 address until the instance is terminated or the
        network interface is detached. For more information about primary IPv6 addresses, see <a
        href="https://docs.aws.amazon.com/AWSEC2/latest/APIReference/API_RunInstances.html">RunInstances</a>.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/LaunchTemplateInstanceNetworkInterfaceSpecification.java