static PointerHolder<QPDF> process_input_source(
    PointerHolder<InputSource> is, char const* password, Options& o)
{
    return do_process(&QPDF::processInputSource, is, password, o, false);
}
static PointerHolder<QPDF> process_input_source(
    PointerHolder<InputSource> is, char const* password, Options& o)
{
    return do_process(&QPDF::processInputSource, is, password, o, false);
}