Github user sebfz1 commented on the pull request:
https://github.com/apache/wicket/pull/143#issuecomment-161232675
+1 too, not fan of `IModel...`.
Then I guess it would be possible to add a `ExternalImage(String id,
IModel<List<Seriarizable>> srcSetModel)` ctor ;)
Another remark I did earlier about my concern on `src != null ?
Model.of(src) : null`. It means that supplying a null value will result of a
null model, leading to a search of a compound model in the component hierarchy,
which is confusing IMHO.
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