Can you help explain what these outputs mean?

Questions
#1

for (const Step& step : state->transform_steps) {

if (const SplitStepNode* const split_step = step.as<SplitStepNode>()) {

  // if (split_step->lengths.size() == 4) {

  LOG(INFO) << "split->iterid:" << split_step->iter_id;

  LOG(INFO) << "split_step->lengths.size():"<< split_step->lengths.size();

  LOG(INFO) << "extent->value:" << split_step->extent.value();

  int64_t split_length = 1;

  for (const Optional<Integer>& len : split_step->lengths) {

    split_length *= len.value()->value;

    LOG(INFO) << "len.value():" << len.value()->value;

  }

  LOG(INFO)<<"split_length: " << split_length;

  // }

}

}

#2

I think I know the answer. Thanks!