public void setIpv4PrefixCount(Integer ipv4PrefixCount) {
        this.ipv4PrefixCount = ipv4PrefixCount;
    }
<p>
The number of IPv4 prefixes that Amazon Web Services automatically assigns to the network interface.
</p>
<p>
You can't specify a count of IPv4 prefixes if you've specified one of the following: specific IPv4 prefixes,
specific private IPv4 addresses, or a count of private IPv4 addresses.
</p>

@param ipv4PrefixCount
       The number of IPv4 prefixes that Amazon Web Services automatically assigns to the network interface.</p>
       <p>
       You can't specify a count of IPv4 prefixes if you've specified one of the following: specific IPv4
       prefixes, specific private IPv4 addresses, or a count of private IPv4 addresses.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/CreateNetworkInterfaceRequest.java