//4.1] construct
String url = "inf://custom/" + fileId.toString();
InternalInfiniteFile test4 = new InternalInfiniteFile(url, auth);
//4.2] list files
InfiniteFile[] test4_2_files = test4.listFiles();
System.out.println("4.2: LISTED="+test4_2_files.length);
for (InfiniteFile test4_2_file: test4_2_files) {
// 4.2.1] child file metadata
System.out.println("4.2: test4_2_file=" + new Date(test4_2_file.getDate()) + " | " + test4_2_file.getName() +
" | " + test4_2_file.getUrlPath() + " | " + test4_2_file.getUrlString() + " | " + test4_2_file.getURI().toString());