public void setAcm(VirtualGatewayListenerTlsAcmCertificate acm) {
        this.acm = acm;
    }
<p>
A reference to an object that represents an Certificate Manager certificate.
</p>

@param acm
       A reference to an object that represents an Certificate Manager certificate.
aws-java-sdk-appmesh/src/main/java/com/amazonaws/services/appmesh/model/VirtualGatewayListenerTlsCertificate.java