public java.util.List<UnsuccessfulItem> getUnsuccessful() {
        if (unsuccessful == null) {
            unsuccessful = new com.amazonaws.internal.SdkInternalList<UnsuccessfulItem>();
        }
        return unsuccessful;
    }
<p>
The IDs of the Dedicated Hosts that could not be released, including an error message.
</p>

@return The IDs of the Dedicated Hosts that could not be released, including an error message.
aws-java-sdk-ec2/src/main/java/com/amazonaws/services/ec2/model/ReleaseHostsResult.java