--- /dev/null
+<?php
+
+namespace Drupal\pbt_entity_test\Entity;
+
+use Drupal\Core\Field\BaseFieldDefinition;
+use Drupal\Core\Entity\ContentEntityBase;
+use Drupal\Core\Entity\EntityTypeInterface;
+
+/**
+ * Defines a content entity type that has a string ID.
+ *
+ * @ContentEntityType(
+ * id = "test_entity",
+ * label = @Translation("Test entity"),
+ * base_table = "test_entity_table",
+ * handlers = {
+ * "route_provider" = {
+ * "html" = "Drupal\Core\Entity\Routing\DefaultHtmlRouteProvider",
+ * },
+ * },
+ * links = {
+ * "canonical" = "/test-entity/{test_entity}",
+ * },
+ * entity_keys = {
+ * "id" = "id",
+ * "langcode" = "langcode",
+ * }
+ * )
+ */
+class TestEntity extends ContentEntityBase {
+
+ /**
+ * {@inheritdoc}
+ */
+ public static function baseFieldDefinitions(EntityTypeInterface $entity_type) {
+ $fields = parent::baseFieldDefinitions($entity_type);
+
+ $fields['terms'] = BaseFieldDefinition::create('entity_reference')
+ ->setSetting('target_type', 'taxonomy_term')
+ ->setSetting('handler', 'default')
+ ->setLabel(t('terms'));
+
+ return $fields;
+ }
+
+}