3 namespace Drupal\Core\Field;
6 * Defines an interface for required field storage definitions.
8 interface RequiredFieldStorageDefinitionInterface {
11 * Returns whether the field storage is required.
13 * If a field storage is required, NOT NULL constraints will be added
14 * automatically for the required properties of a field type.
17 * TRUE if the field storage is required, FALSE otherwise.
19 public function isStorageRequired();