public String getNewDBInstanceIdentifier() {
        return this.newDBInstanceIdentifier;
    }
<p>
The new DB instance identifier for the DB instance when renaming a DB instance. When you change the DB instance
identifier, an instance reboot will occur immediately if you set <code>Apply Immediately</code> to true, or will
occur during the next maintenance window if <code>Apply Immediately</code> to false. This value is stored as a
lowercase string.
</p>
<p>
Constraints:
</p>
<ul>
<li>
<p>
Must contain from 1 to 63 letters, numbers, or hyphens.
</p>
</li>
<li>
<p>
The first character must be a letter.
</p>
</li>
<li>
<p>
Cannot end with a hyphen or contain two consecutive hyphens.
</p>
</li>
</ul>
<p>
Example: <code>mydbinstance</code>
</p>

@return The new DB instance identifier for the DB instance when renaming a DB instance. When you change the DB
        instance identifier, an instance reboot will occur immediately if you set <code>Apply Immediately</code>
        to true, or will occur during the next maintenance window if <code>Apply Immediately</code> to false.
        This value is stored as a lowercase string.</p>
        <p>
        Constraints:
        </p>
        <ul>
        <li>
        <p>
        Must contain from 1 to 63 letters, numbers, or hyphens.
        </p>
        </li>
        <li>
        <p>
        The first character must be a letter.
        </p>
        </li>
        <li>
        <p>
        Cannot end with a hyphen or contain two consecutive hyphens.
        </p>
        </li>
        </ul>
        <p>
        Example: <code>mydbinstance</code>
aws-java-sdk-neptune/src/main/java/com/amazonaws/services/neptune/model/ModifyDBInstanceRequest.java