Update to Drupal 8.1.9. For more information, see https://www.drupal.org/project/drupal/releases/8.1.9

core/modules/migrate/src/Plugin/MigratePluginManagerInterface.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Drupal\migrate\Plugin;
+
+use Drupal\Component\Plugin\PluginManagerInterface;
+
+interface MigratePluginManagerInterface extends PluginManagerInterface {
+
+  /**
+   * Creates a pre-configured instance of a migration plugin.
+   *
+   * A specific createInstance method is necessary to pass the migration on.
+   *
+   * @param string $plugin_id
+   *   The ID of the plugin being instantiated.
+   * @param array $configuration
+   *   An array of configuration relevant to the plugin instance.
+   * @param \Drupal\migrate\Plugin\MigrationInterface $migration
+   *   The migration context in which the plugin will run.
+   *
+   * @return object
+   *   A fully configured plugin instance.
+   *
+   * @throws \Drupal\Component\Plugin\Exception\PluginException
+   *   If the instance cannot be created, such as if the ID is invalid.
+   */
+  public function createInstance($plugin_id, array $configuration = [], MigrationInterface $migration = NULL);
+
+}