thrownew\Drupal\Core\Entity\Exception\FieldStorageDefinitionUpdateForbiddenException(t('A list field (@field_name) with existing data cannot have its keys changed.',array('@field_name'=>$field_storage->getName())));
thrownewFieldStorageDefinitionUpdateForbiddenException(t('A list field (@field_name) with existing data cannot have its keys changed.',array('@field_name'=>$field_storage->getName())));