code: def _fix_orig_vcf_refs(data):
      
      variantcaller = tz.get_in(("config", "algorithm", "variantcaller"), data)
      if variantcaller:
          data["vrn_file_orig"] = data["vrn_file"]
      for i, sub in enumerate(data.get("group_orig", [])):
          sub_vrn = sub.pop("vrn_file", None)
          if sub_vrn:
              sub["vrn_file_orig"] = sub_vrn
              data["group_orig"][i] = sub
      return data
docs: Supply references to initial variantcalls if run in addition to batching.