public String getPreferredBackupWindow() {
        return this.preferredBackupWindow;
    }
<p>
The time range each day during which automated backups are created if automated backups are enabled. For more
information, see <a href=
"https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithAutomatedBackups.html#USER_WorkingWithAutomatedBackups.BackupWindow"
>Backup window</a> in the <i>Amazon RDS User Guide.</i>
</p>
<p>
Constraints:
</p>
<ul>
<li>
<p>
Must be in the format <code>hh24:mi-hh24:mi</code>.
</p>
</li>
<li>
<p>
Must be in Universal Coordinated Time (UTC).
</p>
</li>
<li>
<p>
Must not conflict with the preferred maintenance window.
</p>
</li>
<li>
<p>
Must be at least 30 minutes.
</p>
</li>
</ul>

@return The time range each day during which automated backups are created if automated backups are enabled. For
        more information, see <a href=
        "https://docs.aws.amazon.com/AmazonRDS/latest/UserGuide/USER_WorkingWithAutomatedBackups.html#USER_WorkingWithAutomatedBackups.BackupWindow"
        >Backup window</a> in the <i>Amazon RDS User Guide.</i> </p>
        <p>
        Constraints:
        </p>
        <ul>
        <li>
        <p>
        Must be in the format <code>hh24:mi-hh24:mi</code>.
        </p>
        </li>
        <li>
        <p>
        Must be in Universal Coordinated Time (UTC).
        </p>
        </li>
        <li>
        <p>
        Must not conflict with the preferred maintenance window.
        </p>
        </li>
        <li>
        <p>
        Must be at least 30 minutes.
        </p>
        </li>
aws-java-sdk-rds/src/main/java/com/amazonaws/services/rds/model/RestoreDBInstanceFromS3Request.java