public void setMinRetentionDays(Long minRetentionDays) {
        this.minRetentionDays = minRetentionDays;
    }
<p>
This setting specifies the minimum retention period that the vault retains its recovery points. If this parameter
is not specified, no minimum retention period is enforced.
</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 a job 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.
</p>

@param minRetentionDays
       This setting specifies the minimum retention period that the vault retains its recovery points. If this
       parameter is not specified, no minimum retention period is enforced.</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 a job 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.
aws-java-sdk-backup/src/main/java/com/amazonaws/services/backup/model/CreateLogicallyAirGappedBackupVaultRequest.java