there is a method in class ActivityGraphFacadeLogicImpl.java

protected Collection getSubvertices(Predicate collectionFilter) {
        CompositeState compositeState =
         (CompositeState) metaObject.getTop();
        return filter(compositeState.getSubvertex(), collectionFilter);
}

i not really understand ?!? you assume getTop() answers CompositeState-Obj, so you make a down-cast to it. but how could this work? i'm currently working on an addendum to support SubActivityState-Elements (which are real CompositeState-Obj) to modell Use-Case inclusion respectively struts-workflow handling etc.

so could you explain or give me a hint?

thx

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