Overrides \Drupal\views\Plugin\views\display\DisplayPluginBase::getArgumentText().
Overrides DisplayPluginBase::getArgumentText
public function getArgumentText() {
return array(
'filter value not present' => t('When the filter value is <em>NOT</em> in the URL'),
'filter value present' => t('When the filter value <em>IS</em> in the URL or a default is provided'),
'description' => t('The contextual filter values is provided by the URL.'),
);
}