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- <?php
- namespace Drupal\Core\Form;
- /**
- * Provides an interface for a Form that has a base form ID.
- *
- * This will become the $form_state->getBuildInfo()['base_form_id'] used to
- * generate the name of hook_form_BASE_FORM_ID_alter().
- */
- interface BaseFormIdInterface extends FormInterface {
- /**
- * Returns a string identifying the base form.
- *
- * @return string|null
- * The string identifying the base form or NULL if this is not a base form.
- */
- public function getBaseFormId();
- }
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