Group { public void mark() { if (!marked) { preferencesGroup.getRenderer().addStyleClass(MARKED_STYLE_CLASS); preferencesGroup.getRenderer().getTitleLabel().setOnMouseExited(unmarker); marked = !marked; } } 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 mark() { }