Drupal 8.0.0 beta 12. More info: https://www.drupal.org/node/2514176

core/modules/migrate/src/MigrateBuildDependencyInterface.php

@@ -0,0 +1,25 @@
+<?php
+/**
+ * @file
+ * Contains \Drupal\migrate\MigrateBuildDependencyInterface.
+ */
+
+namespace Drupal\migrate;
+
+
+interface MigrateBuildDependencyInterface {
+
+  /**
+   * Builds a dependency tree for the migrations and set their order.
+   *
+   * @param \Drupal\migrate\Entity\MigrationInterface[] $migrations
+   *   Array of loaded migrations with their declared dependencies.
+   * @param array $dynamic_ids
+   *   Keys are dynamic ids (for example node:*) values are a list of loaded
+   *   migration ids (for example node:page, node:article).
+   *
+   * @return array
+   *   An array of migrations.
+   */
+  public function buildDependencyMigration(array $migrations, array $dynamic_ids);
+}