Overrides \Drupal\views\Plugin\views\PluginBase::init().
The style options might come externally as the style can be sourced from at least two locations. If it's not included, look on the display.
Overrides PluginBase::init
public function init(ViewExecutable $view, DisplayPluginBase $display, array &$options = NULL) {
parent::init($view, $display, $options);
if ($this
->usesRowPlugin() && $display
->getOption('row')) {
$this->view->rowPlugin = $display
->getPlugin('row');
}
$this->options += array(
'grouping' => array(),
);
}