* description = @Translation("This field manages configuration and presentation of comments on an entity."),
* list_class = "\Drupal\comment\CommentFieldItemList",
* default_widget = "comment_default",
- * default_formatter = "comment_default"
+ * default_formatter = "comment_default",
+ * cardinality = 1,
* )
*/
class CommentItem extends FieldItemBase implements CommentItemInterface {