code: def _repair(record: Dict[str, Any]) -> Dict[str, Any]:
      
      output_records = record.get("output_records")
      if record.get("_type", None) == "IterationRecord" and output_records is not None:
          birdsite_record = output_records.get("birdsite")
  
          # check for the bug
          if isinstance(birdsite_record, dict) and birdsite_record.get("_type") == "IterationRecord":
  
              # get to the bottom of the corrupted record
              failed = False
              while birdsite_record.get("_type") == "IterationRecord":
                  sub_record = birdsite_record.get("output_records")
                  if sub_record is None:
                      failed = True
                      break
  
                  birdsite_record = sub_record.get("birdsite")
                  if birdsite_record is None:
                      failed = True
                      break
  
              if failed:
                  return record
  
              # add type
              birdsite_record["_type"] = TweetRecord.__name__
  
              # lift extra keys, just in case
              if "extra_keys" in birdsite_record:
                  record_extra_values = record.get("extra_keys", {})
                  for key, value in birdsite_record["extra_keys"].items():
                      if key not in record_extra_values:
                          record_extra_values[key] = value
  
                  record["extra_keys"] = record_extra_values
  
                  del birdsite_record["extra_keys"]
  
              output_records["birdsite"] = birdsite_record
  
          # pull that correct record up to the top level, fixing corruption
          record["output_records"] = output_records
  
      return record
docs: Repair a corrupted IterationRecord with a specific known issue.