public String getRetentionPeriod() {
        return this.retentionPeriod;
    }
<p>
The enum value sets the period for retaining emails in an archive.
</p>

@return The enum value sets the period for retaining emails in an archive.
@see RetentionPeriod
aws-java-sdk-mailmanager/src/main/java/com/amazonaws/services/mailmanager/model/ArchiveRetention.java