public void setCustomDnsServers(java.util.Collection<String> customDnsServers) {
        if (customDnsServers == null) {
            this.customDnsServers = null;
            return;
        }

        this.customDnsServers = new com.amazonaws.internal.SdkInternalList<String>(customDnsServers);
    }
<p>
The IPv4 address range, in CIDR notation, of the DNS servers to be used. You can specify up to two DNS servers.
Ensure that the DNS servers can be reached by the clients. The specified values overwrite the existing values.
</p>

@param customDnsServers
       The IPv4 address range, in CIDR notation, of the DNS servers to be used. You can specify up to two DNS
       servers. Ensure that the DNS servers can be reached by the clients. The specified values overwrite the
       existing values.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/DnsServersOptionsModifyStructure.java