public String getIntervalUnit() {
        return this.intervalUnit;
    }
<p>
The unit of time in which to measure the <b>Interval</b>. For example, to retain a snapshots in the archive tier
for 6 months, specify <code>Interval=6</code> and <code>IntervalUnit=MONTHS</code>.
</p>

@return The unit of time in which to measure the <b>Interval</b>. For example, to retain a snapshots in the
        archive tier for 6 months, specify <code>Interval=6</code> and <code>IntervalUnit=MONTHS</code>.
@see RetentionIntervalUnitValues
aws-java-sdk-dlm/src/main/java/com/amazonaws/services/dlm/model/RetentionArchiveTier.java