* Override all getters for ScriptFunctions in HierarchyListBoxes, so they
* walk up the list chain on find a function in the parent if they
* do not define one locally.
*/
public Callable getOnChangeEntryText() {
Callable func = super.getOnChangeEntryText();
return func == null && parentEntry != null ?
parentEntry.getList().getOnChangeEntryText() : func;
}