--- /dev/null
+<?php
+
+namespace Drupal\field\Plugin\migrate\process;
+
+@trigger_error('The field_type_defaults process plugin is deprecated in Drupal 8.6.0 and will be removed before Drupal 9.0.0. Use d6_field_type_defaults or d7_field_type_defaults instead. See https://www.drupal.org/node/2944589.', E_USER_DEPRECATED);
+
+use Drupal\field\Plugin\migrate\process\d6\FieldTypeDefaults as D6FieldTypeDefaults;
+
+/**
+ * BC Layer.
+ *
+ * @MigrateProcessPlugin(
+ * id = "field_type_defaults"
+ * )
+ *
+ * @deprecated in Drupal 8.6.x and will be removed before Drupal 9.0.x.
+ * Use d6_field_type_defaults or d7_field_type_defaults instead.
+ *
+ * @see https://www.drupal.org/node/2944589
+ */
+class FieldTypeDefaults extends D6FieldTypeDefaults {}