revert EntityReferenceTest

Author: klausi

tests/src/Kernel/DataProducer/EntityReferenceTest.php

@@ -5,9 +5,33 @@
 use Drupal\Core\Field\FieldStorageDefinitionInterface;
 use Drupal\node\Entity\Node;
 use Drupal\node\Entity\NodeType;
-use Drupal\Tests\field\Traits\EntityReferenceFieldCreationTrait;
 use Drupal\Tests\graphql\Kernel\GraphQLTestBase;
 
+// @todo Drupal 10.1 compatibility: use the deprecated trait for Drupal 10.1.
+if (strpos(\Drupal::VERSION, '10.1') === 0) {
+
+  /**
+   * Helper trait for compatibility with Drupal 9.
+   *
+   * @phpcs:disable Drupal.Classes.ClassFileName.NoMatch
+   */
+  trait EntityReferenceFieldCreationTrait {
+    // @phpstan-ignore-next-line
+    use \Drupal\Tests\field\Traits\EntityReferenceTestTrait;
+
+  }
+}
+else {
+
+  /**
+   * Helper trait for compatibility with Drupal 10.
+   */
+  trait EntityReferenceFieldCreationTrait {
+    use \Drupal\Tests\field\Traits\EntityReferenceFieldCreationTrait;
+
+  }
+}
+
 /**
  * Tests the entity_reference data producers.
  *