--- /dev/null
+<?php
+
+namespace Drupal\Core\Entity\Plugin\Validation\Constraint;
+
+use Symfony\Component\Validator\Constraint;
+
+/**
+ * Entity Reference valid reference constraint.
+ *
+ * Verifies that referenced entities are valid.
+ *
+ * @Constraint(
+ * id = "ReferenceAccess",
+ * label = @Translation("Entity Reference reference access", context = "Validation")
+ * )
+ */
+class ReferenceAccessConstraint extends Constraint {
+
+ /**
+ * The default violation message.
+ *
+ * @var string
+ */
+ public $message = 'You do not have access to the referenced entity (%type: %id).';
+
+}