@Override
    public final <T extends DocumentProperty> ObservableList<T> observableListOf(String key) {
        @SuppressWarnings("unchecked")
        final ObservableList<T> list = (ObservableList<T>)
            children.computeIfAbsent(key, k -> 
                addListeners(k, observableList(new CopyOnWriteArrayList<>()))
            );
        
        return list;
    }
{@inheritDoc}
@deprecated Not supported for observables
tool-parent/tool-config/src/main/java/com/speedment/tool/config/AbstractDocumentProperty.java