Upsert.php

<?php

namespace Drupal\core_fake\Driver\Database\CoreFakeWithAllCustomClasses;

use Drupal\Core\Database\Query\Upsert as QueryUpsert;

/**
 * CoreFakeWithAllCustomClasses implementation of \Drupal\Core\Database\Upsert.
 */
class Upsert extends QueryUpsert {
  
  /**
   * {@inheritdoc}
   */
  public function execute() {
  }
  
  /**
   * {@inheritdoc}
   */
  public function __toString() {
    throw new \BadMethodCallException('Upsert not implemented');
  }

}