* Returns an Unsafe. Suitable for use in a 3rd party package. Replace with a simple call to
     * Unsafe.getUnsafe when integrating into a JDK.
     *
     * @return an Unsafe instance if successful
     */
    @SuppressWarnings("removal") // b/318391980
    private static Unsafe getUnsafe() {
      try {
        return Unsafe.getUnsafe();
      } catch (SecurityException tryReflectionInstead) {
        // We'll try reflection instead.