// option (type).code = 68;
@Test public void should_provide_group_fields_for_first_field_in_custom_option() {
CustomOption option = xtext.find("type", ")", CustomOption.class, IGNORE_CASE);
MessageOptionField codeOptionField = (MessageOptionField) option.getFields().get(0);
IScope scope = scopeProvider.scope_OptionField_target(codeOptionField, reference);
Group groupMessage = xtext.find("Type", " =", Group.class);
assertThat(descriptionsIn(scope), containAllFieldsIn(groupMessage));
}