public Integer getIpv6PrefixCount() {
        return this.ipv6PrefixCount;
    }
<p>
The number of IPv6 prefixes that Amazon Web Services automatically assigns to the network interface.
</p>
<p>
You can't specify a count of IPv6 prefixes if you've specified one of the following: specific IPv6 prefixes,
specific IPv6 addresses, or a count of IPv6 addresses.
</p>

@return The number of IPv6 prefixes that Amazon Web Services automatically assigns to the network interface.</p>
        <p>
        You can't specify a count of IPv6 prefixes if you've specified one of the following: specific IPv6
        prefixes, specific IPv6 addresses, or a count of IPv6 addresses.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/CreateNetworkInterfaceRequest.java