docs: private static boolean copyDir(File pFrom, File pTo, boolean pOverWrite) throws IOException {
          if (pTo.exists() && !pTo.isDirectory()) {
              throw new IOException("A directory may only be copied to another directory, not to a file");
          }
          pTo.mkdirs();  // mkdir?
          boolean allOkay = true;
          File[] files = pFrom.listFiles();
  
          for (File file : files) {
              if (!copy(file, new File(pTo, file.getName()), pOverWrite)) {
                  allOkay = false;
              }
          }
          return allOkay;
      }