public void should_not_have_any_of_these(String... expected_options) {
   Strings option_strings = get_all_options();
   Strings strings_present = option_strings.has_any_of_these(expected_options);
   if (strings_present.is_empty()) {
     action(
         "Verified dropdown "
             + this
             + " has none of these options "
             + Strings.instance_from(expected_options).toString());
   } else {
     error(
         "Expected dropdown "
             + this
             + " to have none of these options "
             + Strings.instance_from(expected_options).toString()
             + " found these "
             + strings_present);
   }
 }
 public Strings get_selected_options() {
   return Strings.instance_from(get_selected_option());
 }