<?php

namespace DrupalYOUR_MODULEPluginDerivative;

use DrupalComponentPluginDerivativeDeriverBase;
use DrupalCorePluginDiscoveryContainerDeriverInterface;
use DrupalCoreEntityEntityStorageInterface;
use SymfonyComponentDependencyInjectionContainerInterface;


/**
 * Provides menu links.
 */
class MyLinks extends DeriverBase implements ContainerDeriverInterface {

  /**
   * The team storage.
   *
   * @var DrupalCoreEntityEntityStorageInterface
   */
  protected $myStorage;


  /**
   * Constructs a XX instance.
   *
   * @param DrupalCoreEntityEntityStorageInterface $storage
   *   The storage.
   */
  public function __construct(EntityStorageInterface $storage) {
    $this->storage = $storage;
  }

  /**
   * {@inheritdoc}
   */
  public static function create(ContainerInterface $container, $base_plugin_id) {
    return new static(
      $container->get('entity.manager')->getStorage('node')
    );
  }
  /**
   * {@inheritdoc}
   */
  public function getDerivativeDefinitions($base_plugin_definition) {
    $links = array();

    $base_plugin_definition = array(
      'enabled' => 1
    ) + $base_plugin_definition;

    // use injected storage !
    $nodes = $this->storage->loadMultiple();

    $links['custom_link'] = array (
            'id' =>  'custom_link',
            'title' => t('Click me'),
            'route_name' => 'entity.node.canonical',
            'route_parameters' => array(
              'nid' => 123,
            ),
            'menu_name' => 'main',
            'parent' => 'parent:menu:id',
          ) + $base_plugin_definition;

    return $links;
  }

}