public void setAppInstanceArn(String appInstanceArn) {
        this.appInstanceArn = appInstanceArn;
    }
<p>
The ARN of the <code>AppInstance</code>.
</p>

@param appInstanceArn
       The ARN of the <code>AppInstance</code>.
aws-java-sdk-chime/src/main/java/com/amazonaws/services/chime/model/ListAppInstanceUsersRequest.java