Phalcon\Mvc\Model\Behavior\NestedSet::appendTo PHP Метод

    public function appendTo(ModelInterface $target, array $attributes = null)
    {
        // Re-search $target
        $target = $target::findFirst($target->{$this->primaryKey});
        return $this->addNode($target, $target->{$this->rightAttribute}, 1, $attributes);
    }