Update to Drupal 8.1.5. For more information, see https://www.drupal.org/project/drupal/releases/8.1.5

core/modules/migrate_drupal/tests/modules/migrate_cckfield_plugin_manager_test/migrate_cckfield_plugin_manager_test.info.yml

@@ -0,0 +1,6 @@
+name: 'Migrate cck field plugin manager test'
+type: module
+description: 'Example module demonstrating the cck field plugin manager in the Migrate API.'
+package: Testing
+version: VERSION
+core: 8.x

core/modules/migrate_drupal/tests/modules/migrate_cckfield_plugin_manager_test/src/Plugin/migrate/cckfield/D6FileField.php

@@ -0,0 +1,29 @@
+<?php
+
+namespace Drupal\migrate_cckfield_plugin_manager_test\Plugin\migrate\cckfield;
+
+use Drupal\migrate_drupal\Plugin\migrate\cckfield\CckFieldPluginBase;
+use Drupal\migrate\Plugin\MigrationInterface;
+
+/**
+ * @MigrateCckField(
+ *   id = "d6_file",
+ *   core = {6},
+ *   type_map = {
+ *     "file" = "file"
+ *   }
+ * )
+ */
+class D6FileField extends CckFieldPluginBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldFormatterMap() {}
+
+  /**
+   * {@inheritdoc}
+   */
+  public function processCckFieldValues(MigrationInterface $migration, $field_name, $data) {}
+
+}

core/modules/migrate_drupal/tests/modules/migrate_cckfield_plugin_manager_test/src/Plugin/migrate/cckfield/D6NoCoreVersionSpecified.php

@@ -0,0 +1,25 @@
+<?php
+
+namespace Drupal\migrate_cckfield_plugin_manager_test\Plugin\migrate\cckfield;
+
+use Drupal\migrate_drupal\Plugin\migrate\cckfield\CckFieldPluginBase;
+use Drupal\migrate\Plugin\MigrationInterface;
+
+/**
+ * @MigrateCckField(
+ *   id = "d6_no_core_version_specified"
+ * )
+ */
+class D6NoCoreVersionSpecified extends CckFieldPluginBase {
+
+  /**
+   * {@inheritdoc}
+   */
+  public function getFieldFormatterMap() {}
+
+  /**
+   * {@inheritdoc}
+   */
+  public function processCckFieldValues(MigrationInterface $migration, $field_name, $data) {}
+
+}