static Map<TextImageAction, File> filesForNiceButtons_map = weakIdentityHashMap();

static L<TextImageAction> filesForNiceButtons(L<File> l, IVF1<File> action) {
  ret mapAndRecordToMap_reversed(filesForNiceButtons_map, l, func(final File f) -> TextImageAction {
    textImageActionToolTip(
      f.getName(),
      isImageFile(f) ? #1101250 : #1101231,
      r { pcallF(action, f) },
      f2s(f) + " (" + toK(fileSize(f)) + " K)",)
  });
}

static L<TextImageAction> filesForNiceButtons(L<File> l) {
  ret filesForNiceButtons(l, f -> { thread { genericUI_openFile(f); }});
}