--- /dev/null
+<?php
+
+namespace Drupal\migrate\Plugin\migrate\process;
+
+@trigger_error('The ' . __NAMESPACE__ . '\Migration is deprecated in
+Drupal 8.4.0 and will be removed before Drupal 9.0.0. Instead, use ' . __NAMESPACE__ . '\MigrationLookup', E_USER_DEPRECATED);
+
+/**
+ * Calculates the value of a property based on a previous migration.
+ *
+ * @link https://www.drupal.org/node/2149801 Online handbook documentation for migration process plugin @endlink
+ *
+ * @MigrateProcessPlugin(
+ * id = "migration"
+ * )
+ *
+ * @deprecated in Drupal 8.3.x and will be removed in Drupal 9.0.x.
+ * Use \Drupal\migrate\Plugin\migrate\process\MigrationLookup instead.
+ */
+class Migration extends MigrationLookup { }