public Long getMinRetentionDays() {
        return this.minRetentionDays;
    }
<p>
The Backup Vault Lock setting that specifies the minimum retention period that the vault retains its recovery
points. If this parameter is not specified, Vault Lock does not enforce a minimum retention period.
</p>
<p>
If specified, any backup or copy job to the vault must have a lifecycle policy with a retention period equal to
or longer than the minimum retention period. If the job's retention period is shorter than that minimum retention
period, then the vault fails the backup or copy job, and you should either modify your lifecycle settings or use
a different vault. Recovery points already stored in the vault prior to Vault Lock are not affected.
</p>

@return The Backup Vault Lock setting that specifies the minimum retention period that the vault retains its
        recovery points. If this parameter is not specified, Vault Lock does not enforce a minimum retention
        period.</p>
        <p>
        If specified, any backup or copy job to the vault must have a lifecycle policy with a retention period
        equal to or longer than the minimum retention period. If the job's retention period is shorter than that
        minimum retention period, then the vault fails the backup or copy job, and you should either modify your
        lifecycle settings or use a different vault. Recovery points already stored in the vault prior to Vault
        Lock are not affected.
aws-java-sdk-backup/src/main/java/com/amazonaws/services/backup/model/DescribeBackupVaultResult.java