Github user klopfdreh commented on the pull request:
https://github.com/apache/wicket/pull/143#issuecomment-161429048
Only for comparison
```java
ExternalImage externalImage2 = new ExternalImage("externalImage2",
"http://wicket.apache.org/img/wicket-7-bg.jpg";,
Arrays.<Serializable>asList(
"http://wicket.apache.org/img/wicket-7-bg-1.jpg";,
"http://wicket.apache.org/img/wicket-7-bg-2.jpg";));
```
```java
ExternalImage externalImage2 = new ExternalImage("externalImage2",
"http://wicket.apache.org/img/wicket-7-bg.jpg";,
"http://wicket.apache.org/img/wicket-7-bg-1.jpg";,
"http://wicket.apache.org/img/wicket-7-bg-2.jpg";);
```
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![http://wicket.apache.org/img/wicket-7-bg.jpg"](http://wicket.apache.org/img/wicket-7-bg.jpg"){kind=link}
![http://wicket.apache.org/img/wicket-7-bg-1.jpg"](http://wicket.apache.org/img/wicket-7-bg-1.jpg"){kind=link}
![http://wicket.apache.org/img/wicket-7-bg-2.jpg"](http://wicket.apache.org/img/wicket-7-bg-2.jpg"){kind=link}