public void setFallBackPhoneNumber(String fallBackPhoneNumber) {
        this.fallBackPhoneNumber = fallBackPhoneNumber;
    }
<p>
The phone number to route calls to after a proxy session expires.
</p>

@param fallBackPhoneNumber
       The phone number to route calls to after a proxy session expires.
aws-java-sdk-chimesdkvoice/src/main/java/com/amazonaws/services/chimesdkvoice/model/Proxy.java