SearchRow.php

<?php

namespace Drupal\search\Plugin\views\row;

use Drupal\Core\Form\FormStateInterface;
use Drupal\views\Plugin\views\row\RowPluginBase;

/**
 * Row handler plugin for displaying search results.
 *
 * @ViewsRow(
 *   id = "search_view",
 *   title = @Translation("Search results"),
 *   help = @Translation("Provides a row plugin to display search results.")
 * )
 */
class SearchRow extends RowPluginBase {
    
    /**
     * {@inheritdoc}
     */
    protected function defineOptions() {
        $options = parent::defineOptions();
        $options['score'] = [
            'default' => TRUE,
        ];
        return $options;
    }
    
    /**
     * {@inheritdoc}
     */
    public function buildOptionsForm(&$form, FormStateInterface $form_state) {
        $form['score'] = [
            '#type' => 'checkbox',
            '#title' => $this->t('Display score'),
            '#default_value' => $this->options['score'],
        ];
    }
    
    /**
     * {@inheritdoc}
     */
    public function render($row) {
        return [
            '#theme' => $this->themeFunctions(),
            '#view' => $this->view,
            '#options' => $this->options,
            '#row' => $row,
        ];
    }

}