static ThreadLocal<Bool> dataToTable_useStruct = threadLocalWithDefault(true);

static void dataToTable_dynSet(L l, int i, O s) {
  while (i >= l.size()) l.add("");
  l.set(i, s);
}

static L dataToTable_makeRow(O x, L<S> cols) {
  if (instanceOf(x, "DynamicObject"))
    x = get_raw(x, "fieldValues");

  if (x instanceof Map) {
    Map m = cast x;
    new L row;
    for (O _field : keysWithoutHidden(m)) {
      S field = cast _field;
      O value = m.get(field);
      int col = cols.indexOf(field);
      if (col < 0) {
        cols.add(field);
        col = cols.size()-1;
      }
      dataToTable_dynSet(row, col, dataToTable_wrapValue(value));
    }
    ret row;
  }
  
  // XXX new
  if (x cast L)
    ret allToString(x);
    
  ret litlist(structureOrText(x));
}

static O dataToTable_wrapValue(O o) {
  if (o instanceof BufferedImage) ret o;
  if (o cast MakesBufferedImage) ret o.getBufferedImage();
  ifclass RGBImage
    if (o instanceof RGBImage) ret o; // huh?
  endif
  if (o instanceof Bool) ret o;
  ret dataToTable_useStruct! ? structureOrTextForUser(o) : strOrNull(o);
}

Began life as a copy of #1001613