FieldConfigInterface.php

<?php

namespace Drupal\field;

use Drupal\Core\Config\Entity\ConfigEntityInterface;
use Drupal\Core\Field\FieldDefinitionInterface;

/**
 * Provides an interface defining a field entity.
 */
interface FieldConfigInterface extends ConfigEntityInterface, FieldDefinitionInterface {
    
    /**
     * Gets the deleted flag of the field.
     *
     * @return bool
     *   Returns TRUE if the field is deleted.
     */
    public function isDeleted();

}