// gdcm::File::IsReadable() is no usable here, because we deal with
// any kind of gdcm::Readable *document*
// not only gdcm::File (as opposed to gdcm::DicomDir)
// gdcm::File::IsReadable() is no usable here, because we deal with
// any kind of gdcm::Readable *document*
// not only gdcm::File (as opposed to gdcm::DicomDir)