/**
* @inheritdoc
*/
public function removeChild($parent, $child)
{
$result = parent::removeChild($parent, $child);
if ($this->_children !== null) {
$query = (new Query())->select('child')->from($this->itemChildTable)->where(['parent' => $parent->name]);
$this->_children[$parent->name] = $query->column($this->db);
}
$this->invalidate(self::PART_CHILDREN);
return $result;
}
