public String getHttpProtocolIpv6() {
        return this.httpProtocolIpv6;
    }
<p>
Enables or disables the IPv6 endpoint for the instance metadata service. Applies only if you enabled the HTTP
metadata endpoint.
</p>

@return Enables or disables the IPv6 endpoint for the instance metadata service. Applies only if you enabled the
        HTTP metadata endpoint.
@see InstanceMetadataProtocolState
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/ModifyInstanceMetadataOptionsRequest.java