public LoadBalancerTlsCertificate withSerial(String serial) {
        setSerial(serial);
        return this;
    }
<p>
The serial number of the certificate.
</p>

@param serial
       The serial number of the certificate.
@return Returns a reference to this object so that method calls can be chained together.
aws-java-sdk-lightsail/src/main/java/com/amazonaws/services/lightsail/model/LoadBalancerTlsCertificate.java