Nestable\Services\NestableService::doActive PHP Метод

    protected function doActive($href, $label)
    {
        if (is_array($this->active) && array_key_exists('callback', $this->active)) {
            $this->active = $this->active['callback'];
        }
        if ($this->active) {
            // Find active path in array
            if (is_array($this->active) && count($this->active) > 0) {
                $result = array_search($href, $this->active);
                if ($result !== false) {
                    unset($this->active[$result]);
                    return 'class="active"';
                }
            } elseif ($this->active instanceof Closure) {
                call_user_func_array($this->active, [$this, $href, $label]);
                $attrs = $this->renderAttr($this->optionAttr);
                $this->optionAttr = null;
                return $attrs;
            } else {
                if ($this->active == $href) {
                    $this->active = null;
                    return 'class="active"';
                }
            }
        }
    }