public void buildDocument() {
final File unzippedRoot = fileresourceManager.unzipFileResource(resourceable);
// with VFS FIXME:pb:c: remove casts to LocalFileImpl and LocalFolderImpl if no longer needed.
final VFSContainer vfsUnzippedRoot = new LocalFolderImpl(unzippedRoot);
final VFSItem vfsQTI = vfsUnzippedRoot.resolve("qti.xml");
// getDocument(..) ensures that InputStream is closed in every case.
document = QTIHelper.getDocument((LocalFileImpl) vfsQTI);
}
