public void setExpirationDate(java.util.Date expirationDate) {
        this.expirationDate = expirationDate;
    }
<p>
The timestamp when the client certificate will expire.
</p>

@param expirationDate
       The timestamp when the client certificate will expire.
aws-java-sdk-api-gateway/src/main/java/com/amazonaws/services/apigateway/model/ClientCertificate.java