* if so.
     */
    @GuardedBy("this")
    void update(int len) throws IOException {
      if (memory != null && (memory.getCount() + len > fileThreshold)) {
        File temp = TempFileCreator.INSTANCE.createTempFile("FileBackedOutputStream");
        if (resetWhenGarbageCollected) {
          // References are not guaranteed to be collected on system shutdown; this is insurance.
          temp.deleteOnExit();

   *     call to {@code createTempDirectory}.
   */
  @Beta
  @Deprecated
  @J2ObjCIncompatible
  public static File createTempDir() {
    return TempFileCreator.INSTANCE.createTempDir();
  }

  /**
   * Creates an empty file or updates the last updated timestamp on the same as the unix command of
   * the same name.
   *