Group { public void addToBreadcrumb(String breadCrumb) { setBreadcrumb(breadCrumb + Constants.BREADCRUMB_DELIMITER + description); settings.forEach(setting -> setting.addToBreadcrumb(getBreadcrumb())); } private  Group(String description, Setting... settings); static Group of(String description, Setting... settings); static Group of(Setting... settings); Group description(String description); String getDescription(); List<Setting> getSettings(); PreferencesFxGroup getPreferencesGroup(); void setPreferencesGroup(PreferencesFxGroup preferencesGroup); void mark(); void unmark(); void addToBreadcrumb(String breadCrumb); String getBreadcrumb(); StringProperty breadcrumbProperty(); void setBreadcrumb(String breadcrumb);  }
@Test public void addToBreadcrumb() { }