TestLazyPluginCollection.php

<?php

namespace Drupal\plugin_test\Plugin;

use Drupal\Component\Plugin\LazyPluginCollection;
use Drupal\Component\Plugin\PluginManagerInterface;

/**
 * Defines a plugin collection which uses fruit plugins.
 */
class TestLazyPluginCollection extends LazyPluginCollection {
    
    /**
     * Stores the plugin manager used by this collection.
     *
     * @var \Drupal\Component\Plugin\PluginManagerInterface
     */
    protected $manager;
    
    /**
     * Constructs a TestLazyPluginCollection object.
     *
     * @param \Drupal\Component\Plugin\PluginManagerInterface $manager
     *   The plugin manager that handles test plugins.
     */
    public function __construct(PluginManagerInterface $manager) {
        $this->manager = $manager;
        $instance_ids = array_keys($this->manager
            ->getDefinitions());
        $this->instanceIds = array_combine($instance_ids, $instance_ids);
    }
    
    /**
     * {@inheritdoc}
     */
    protected function initializePlugin($instance_id) {
        $this->pluginInstances[$instance_id] = $this->manager
            ->createInstance($instance_id, []);
    }
    
    /**
     * {@inheritdoc}
     */
    public function getConfiguration() {
        return [];
    }
    
    /**
     * {@inheritdoc}
     */
    public function setConfiguration($configuration) {
        return $this;
    }

}