flag-8.x-4.x-dev/modules/flag_count/flag_count.module

<?php

/**
 * @file
 * The Flag count module.
 *
 * This module creates a @ActionLinkType plugin as a demonstration of how to
 * use the twig extension flag.twig.count. The content is intended to be an
 *  example and may be deleted afterward.
 */

/**
 * Implements hook_theme().
 */
function flag_count_theme() {
  return [
    'flag_count' => [
      'variables' => [
        'attributes' => [],
        'title' => NULL,
        'action' => 'flag',
        'flag' => NULL,
        'flaggable' => NULL,
      ],
    ],
  ];
}