BOOLEAN out_norms_only_stable "Output only stable norms (omit e.g. maxloc)" STEERABLE=always

STRING out_norm_vars "Variables to output as norms" STEERABLE=always
{
  ".*" :: ""
} "all"
BOOLEAN out_norm_omit_unstable "Omit unstable norms (e.g. maxloc)" STEERABLE=always

  if (out_norm_vars[0] == '\0')
    return;

  // Find output groups
  const vector<bool> group_enabled = [&] {
    vector<bool> enabled(CCTK_NumGroups(), false);
    const auto callback{
        [](const int index, const char *const optstring, void *const arg) {
          vector<bool> &enabled = *static_cast<vector<bool> *>(arg);
          enabled.at(CCTK_GroupIndexFromVarI(index)) = true;
        }};
    CCTK_TraverseString(out_norm_vars, callback, &enabled, CCTK_GROUP_OR_VAR);
    if (verbose) {
      CCTK_VINFO("TSV output for groups:");
      for (int gi = 0; gi < CCTK_NumGroups(); ++gi) {
        if (group_enabled.at(gi)) {
          char *const groupname = CCTK_GroupName(gi);
          CCTK_VINFO("  %s", groupname);
          free(groupname);
        }
      }
    }
    return enabled;
  }();
  const auto num_out_groups =
      count(group_enabled.begin(), group_enabled.end(), true);
  if (num_out_groups == 0)
    return;

    if (!out_norms_only_stable) {

    if (!out_norm_omit_unstable) {

    if (!group_enabled.at(gi))
      continue;

        if (!out_norms_only_stable) {

        if (!out_norm_omit_unstable) {