public function excludes($excludes)
    {
        if (is_string($excludes)) {
            $excludes = explode(',', $excludes);
        }

        // when autoload is enable, we need to merge user requested includes with the predefined includes.
        if ($this->autoload and $this->request->get($this->exclude_key)) {
            $excludes = array_merge($excludes, explode(',', $this->request->get($this->exclude_key)));
        }

        $this->manager->parseExcludes($excludes);

        return $this;
    }