public function getIconByExtension(string $extension, bool $include_full_path = false): string
    {
        $data = $this->getData();
        $extension = strtolower($extension);
        $res = $data[$extension] ?? '';

        if (!$res) {
            $res = $this->unknown_extension_icon;
        }

        if ($include_full_path) {
            $res = $this->directory_with_icons . $res;
        }

        return $res;
    }