I've managed to avoid the exceptionchanging the onBind method's
AttributeModifier from a standard Model to a LoadableDetachableModel, e.g.
getComponent().add(new AttributeModifier("onmouseover", true, new
LoadableDetachableModel<CharSequence>() {
@Override
protected CharSequence load() {
return MyBehavior.this.getCallbackScript();
}
}));
Thank
/Johan
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