static void print_rect(std::ostream& out,
                       QPDFObjectHandle::Rectangle const& r)
{
    out << "[" << r.llx << ", " << r.lly << ", "
        << r.urx << ", " << r.ury << "]";
}
static void print_rect(std::ostream& out,
                       QPDFObjectHandle::Rectangle const& r)
{
    out << "[" << r.llx << ", " << r.lly << ", "
        << r.urx << ", " << r.ury << "]";
}