MenuTreeStorage::delete

public MenuTreeStorage::delete($id)

public function delete($id) {
  // Children get re-attached to the menu link's parent.
  $item = $this->loadFull($id);
  // It's possible the link is already deleted.
  if ($item) {
    $parent = $item['parent'];
    $children = $this->loadByProperties(array('parent' => $id));
    foreach ($children as $child) {
      $child['parent'] = $parent;
      $this->save($child);
    }

    $this->doDeleteMultiple([$id]);

    $this->updateParentalStatus($item);
    // Many children may have moved.
    $this->resetDefinitions();
    $this->cacheTagsInvalidator->invalidateTags(['config:system.menu.' . $item['menu_name']]);
  }
}