Constructs a new ActionBag object.
\Drupal\Component\Plugin\PluginManagerInterface $manager: The manager to be used for instantiating plugins.
array $instance_ids: The ids of the plugin instances with which we are dealing.
array $configuration: An array of configuration.
public function __construct(PluginManagerInterface $manager, array $instance_ids, array $configuration) {
$this->manager = $manager;
$this->instanceIDs = drupal_map_assoc($instance_ids);
$this->configuration = $configuration;
}