static FileOutputStream newFileOutputStream(File path) throws IOException {
  ret newFileOutputStream(path.getPath());
}

static FileOutputStream newFileOutputStream(S path) throws IOException {
  ret newFileOutputStream(path, false);
}

static FileOutputStream newFileOutputStream(File path, bool append) throws IOException {
  ret newFileOutputStream(path.getPath(), append);
}

static FileOutputStream newFileOutputStream(S path, bool append) throws IOException {
  mkdirsForFile(path);
  FileOutputStream f = new FileOutputStream(path, append);
  ifndef LeanMode
  _registerIO(f, path, true);
  endifndef
  ret f;
}