public Integer getBackupRetentionPeriod() {
        return this.backupRetentionPeriod;
    }
<p>
The number of days for which automated backups are retained.
</p>
<p>
Not applicable. The retention period for automated backups is managed by the DB cluster. For more information,
see <a>CreateDBCluster</a>.
</p>
<p>
Default: 1
</p>
<p>
Constraints:
</p>
<ul>
<li>
<p>
Must be a value from 0 to 35
</p>
</li>
<li>
<p>
Cannot be set to 0 if the DB instance is a source to Read Replicas
</p>
</li>
</ul>

@return The number of days for which automated backups are retained.</p>
        <p>
        Not applicable. The retention period for automated backups is managed by the DB cluster. For more
        information, see <a>CreateDBCluster</a>.
        </p>
        <p>
        Default: 1
        </p>
        <p>
        Constraints:
        </p>
        <ul>
        <li>
        <p>
        Must be a value from 0 to 35
        </p>
        </li>
        <li>
        <p>
        Cannot be set to 0 if the DB instance is a source to Read Replicas
        </p>
        </li>
aws-java-sdk-neptune/src/main/java/com/amazonaws/services/neptune/model/CreateDBInstanceRequest.java