static IterableIterator scanLog_unstructure_iterator(S progID, S fileName) {
  ret scanLog_unstructure_iterator(getProgramFile(progID, fileName));
}

static IterableIterator scanLog_unstructure_iterator(S fileName) {
  ret scanLog_unstructure_iterator(getProgramFile(fileName));
}

static IterableIterator scanLog_unstructure_iterator(File file) {
  final Iterator<S> it = scanLog_iterator(file);
  ret iteratorFromFunction(func -> O {
    while (it.hasNext()) pcall {
      ret unstructure_dropLeadingTimestamp(it.next());
    }
    null;
  });
}