Update to drupal 8.0.0-rc1. For more information, see https://www.drupal.org/node/2582663

core/modules/migrate/src/Event/MigrateRowDeleteEvent.php

@@ -0,0 +1,65 @@
+<?php
+
+/**
+ * @file
+ * Contains \Drupal\migrate\Event\MigrateRowDeleteEvent.
+ */
+
+namespace Drupal\migrate\Event;
+
+use Drupal\migrate\Entity\MigrationInterface;
+use Symfony\Component\EventDispatcher\Event;
+
+/**
+ * Wraps a row deletion event for event listeners.
+ */
+class MigrateRowDeleteEvent extends Event {
+
+  /**
+   * Migration entity.
+   *
+   * @var \Drupal\migrate\Entity\MigrationInterface
+   */
+  protected $migration;
+
+  /**
+   * Values representing the destination ID.
+   *
+   * @var array
+   */
+  protected $destinationIdValues;
+
+  /**
+   * Constructs a row deletion event object.
+   *
+   * @param \Drupal\migrate\Entity\MigrationInterface $migration
+   *   Migration entity.
+   * @param array $destination_id_values
+   *   Values represent the destination ID.
+   */
+  public function __construct(MigrationInterface $migration, $destination_id_values) {
+    $this->migration = $migration;
+    $this->destinationIdValues = $destination_id_values;
+  }
+
+  /**
+   * Gets the migration entity.
+   *
+   * @return \Drupal\migrate\Entity\MigrationInterface
+   *   The migration being rolled back.
+   */
+  public function getMigration() {
+    return $this->migration;
+  }
+
+  /**
+   * Gets the destination ID values.
+   *
+   * @return array
+   *   The destination ID as an array.
+   */
+  public function getDestinationIdValues() {
+    return $this->destinationIdValues;
+  }
+
+}