ViewsPluginManager.php

<?php

namespace Drupal\views\Plugin;

use Drupal\Component\Plugin\Attribute\Plugin;
use Drupal\Core\Cache\CacheBackendInterface;
use Drupal\Core\Extension\ModuleHandlerInterface;
use Drupal\Core\Plugin\DefaultPluginManager;
use Symfony\Component\DependencyInjection\Container;

/**
 * Plugin type manager for all views plugins.
 *
 * @ingroup views_plugins
 */
class ViewsPluginManager extends DefaultPluginManager {
    
    /**
     * Constructs a ViewsPluginManager object.
     *
     * @param string $type
     *   The plugin type, for example filter.
     * @param \Traversable $namespaces
     *   An object that implements \Traversable which contains the root paths
     *   keyed by the corresponding namespace to look for plugin implementations.
     * @param \Drupal\Core\Cache\CacheBackendInterface $cache_backend
     *   Cache backend instance to use.
     * @param \Drupal\Core\Extension\ModuleHandlerInterface $module_handler
     *   The module handler to invoke the alter hook with.
     */
    public function __construct($type, \Traversable $namespaces, CacheBackendInterface $cache_backend, ModuleHandlerInterface $module_handler) {
        $plugin_definition_annotation_name = 'Drupal\\views\\Annotation\\Views' . Container::camelize($type);
        // Special handling until all views plugins have attribute classes.
        $attribute_name_candidate = 'Drupal\\views\\Attribute\\Views' . Container::camelize($type);
        $plugin_definition_attribute_name = class_exists($attribute_name_candidate) ? $attribute_name_candidate : Plugin::class;
        parent::__construct("Plugin/views/{$type}", $namespaces, $module_handler, 'Drupal\\views\\Plugin\\views\\ViewsPluginInterface', $plugin_definition_attribute_name, $plugin_definition_annotation_name);
        $this->defaults += [
            'parent' => 'parent',
            'plugin_type' => $type,
            'register_theme' => TRUE,
        ];
        $this->alterInfo('views_plugins_' . $type);
        $this->setCacheBackend($cache_backend, "views:{$type}");
    }

}