--- /dev/null
+<?php
+
+namespace Drupal\entity_reference_revisions\Plugin\DataType;
+
+use Drupal\Core\TypedData\ComplexDataInterface;
+use Drupal\Core\Entity\Plugin\DataType\EntityAdapter;
+
+/**
+ * Defines the "entity" data type.
+ *
+ * Instances of this class wrap entity objects and allow to deal with entities
+ * based upon the Typed Data API.
+ *
+ * In addition to the "entity" data type, this exposes derived
+ * "entity:$entity_type" and "entity:$entity_type:$bundle" data types.
+ *
+ * @DataType(
+ * id = "entity_revision",
+ * label = @Translation("Entity Revision"),
+ * description = @Translation("All kind of entities with revision information, e.g. nodes, comments or users."),
+ * deriver = "\Drupal\Core\Entity\Plugin\DataType\Deriver\EntityDeriver",
+ * definition_class = "\Drupal\entity_reference_revisions\TypedData\EntityRevisionDataDefinition"
+ * )
+ */
+class EntityRevisionsAdapter extends EntityAdapter implements \IteratorAggregate, ComplexDataInterface {
+
+}