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- <?php
- namespace Drupal\Core\Field;
- /**
- * Defines an interface for required field storage definitions.
- */
- interface RequiredFieldStorageDefinitionInterface {
- /**
- * Returns whether the field storage is required.
- *
- * If a field storage is required, NOT NULL constraints will be added
- * automatically for the required properties of a field type.
- *
- * @return bool
- * TRUE if the field storage is required, FALSE otherwise.
- */
- public function isStorageRequired();
- }
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