Overrides \Drupal\views\Plugin\views\pager\PagerPlugin::defineOptions().
Provides sane defaults for the next/previous links.
Overrides SqlBase::defineOptions
public function defineOptions() {
$options = parent::defineOptions();
$options['tags']['contains']['previous']['default'] = '‹‹';
$options['tags']['contains']['next']['default'] = '››';
return $options;
}