public void setPlatformArn(String platformArn) {
        this.platformArn = platformArn;
    }
<p>
The ARN of the platform version.
</p>

@param platformArn
       The ARN of the platform version.
aws-java-sdk-elasticbeanstalk/src/main/java/com/amazonaws/services/elasticbeanstalk/model/UpdateEnvironmentResult.java