public java.util.List<Integer> getUnavailablePriorities() {
        return unavailablePriorities;
    }
<p>
The priorities of rule groups that are already associated with the VPC. To retry your operation, choose priority
settings that aren't in this list for the rule groups in your new DNS Firewall policy.
</p>

@return The priorities of rule groups that are already associated with the VPC. To retry your operation, choose
        priority settings that aren't in this list for the rule groups in your new DNS Firewall policy.
aws-java-sdk-fms/src/main/java/com/amazonaws/services/fms/model/DnsRuleGroupPriorityConflictViolation.java