private List<String> getIgnoredAttributes(Map<String, Object> attributes) {
        return attributes.entrySet().stream().flatMap(e -> {
            String attr = e.getKey();
            Object value = e.getValue();
            List<String> attrs = new ArrayList<>();
            if (attr.contains("count") && value instanceof Number) {
                attrs.add(attr);
            }
            if (attr.contains("count") && value instanceof String s) {
                String[] split = s.split(":");
                if (split.length > 0) {
                    attrs.add(split[0].trim());
                }
            }
            return attrs.stream();
        }).collect(Collectors.toList());
    }
Set additional attributes in the GUI.
Only needed if child class has additional elements which are not shown
in the parent class.
@param childClassAttributes
@see AsciidoctorConfigBase#load(Path, ActionEvent...)
src/main/java/com/kodedu/config/AsciidoctorConfigBase.java