if (woVersion == 53) {
woPaxGZIs = new MultiBlockInputStream(woDmgIs, blockList);
} else {
//woVersion >= 54
InputStream woPkgIs = new MultiBlockInputStream(woDmgIs, blockList);
XarFile xarfile = new XarFile(woPkgIs);
woPaxGZIs = xarfile.getInputStream("Payload");
}
return new GZIPInputStream(woPaxGZIs);
}