public String getUpdateToken() {
        return this.updateToken;
    }
<p>
A token used for optimistic locking. Network Firewall returns a token to your requests that access the TLS
inspection configuration. The token marks the state of the TLS inspection configuration resource at the time of
the request.
</p>
<p>
To make changes to the TLS inspection configuration, you provide the token in your request. Network Firewall uses
the token to ensure that the TLS inspection configuration hasn't changed since you last retrieved it. If it has
changed, the operation fails with an <code>InvalidTokenException</code>. If this happens, retrieve the TLS
inspection configuration again to get a current copy of it with a current token. Reapply your changes as needed,
then try the operation again using the new token.
</p>

@return A token used for optimistic locking. Network Firewall returns a token to your requests that access the
        TLS inspection configuration. The token marks the state of the TLS inspection configuration resource at
        the time of the request. </p>
        <p>
        To make changes to the TLS inspection configuration, you provide the token in your request. Network
        Firewall uses the token to ensure that the TLS inspection configuration hasn't changed since you last
        retrieved it. If it has changed, the operation fails with an <code>InvalidTokenException</code>. If this
        happens, retrieve the TLS inspection configuration again to get a current copy of it with a current
        token. Reapply your changes as needed, then try the operation again using the new token.
aws-java-sdk-networkfirewall/src/main/java/com/amazonaws/services/networkfirewall/model/CreateTLSInspectionConfigurationResult.java