// true if it bootstrapped
sbool bootstrapDataFrom(S progID) {
  File otherDir = javaxDataDir(progID);
  File myDir = programDir();
  if (sameFile(otherDir, myDir)) false;
  if (!directoryIsEmpty(myDir)) false;
  print("Importing data from: " + progID + " to " + programID());
  copyAllFilesInDirectory_rec_noOverwrite(otherDir, myDir);
  true;
}