function OptionsButtonsWidget::getEmptyLabel

Returns the empty option label to add to the list of options, if any.

Return value

string|null Either a label of the empty option, or NULL.

Overrides OptionsWidgetBase::getEmptyLabel

File

core/lib/Drupal/Core/Field/Plugin/Field/FieldWidget/OptionsButtonsWidget.php, line 65

Class

OptionsButtonsWidget

Plugin implementation of the 'options_buttons' widget.

Namespace

Code

protected function getEmptyLabel() {
  if (!$this->required && !$this->multiple) {
    return $this->t('N/A');
  }
}