public String getPreferredBackupWindow() {
        return this.preferredBackupWindow;
    }
<p>
The daily time range during which automated backups are created for your database if automated backups are
enabled.
</p>
<p>
Constraints:
</p>
<ul>
<li>
<p>
Must be in the <code>hh24:mi-hh24:mi</code> format.
</p>
<p>
Example: <code>16:00-16:30</code>
</p>
</li>
<li>
<p>
Specified in Coordinated Universal 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 daily time range during which automated backups are created for your database if automated backups
        are enabled.</p>
        <p>
        Constraints:
        </p>
        <ul>
        <li>
        <p>
        Must be in the <code>hh24:mi-hh24:mi</code> format.
        </p>
        <p>
        Example: <code>16:00-16:30</code>
        </p>
        </li>
        <li>
        <p>
        Specified in Coordinated Universal 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-lightsail/src/main/java/com/amazonaws/services/lightsail/model/UpdateRelationalDatabaseRequest.java