@Override
    public String toString() {
        return this.value;
    }
<p>
Specifies whether messages that use the configuration set are required to use Transport Layer Security (TLS). If the
value is <code>Require</code>, messages are only delivered if a TLS connection can be established. If the value is
<code>Optional</code>, messages can be delivered in plain text if a TLS connection can't be established.
</p>
aws-java-sdk-pinpointemail/src/main/java/com/amazonaws/services/pinpointemail/model/TlsPolicy.java