code: @Nullable
      public static long[] optLongArray(@Nullable Bundle bundle, @Nullable String key) {
          return optLongArray(bundle, key, new long[0]);
      }
docs: Returns a optional long array value. In other words, returns the value mapped by key if it exists and is a long array.
  The bundle argument is allowed to be {@code null}. If the bundle is null, this method returns null.
  @param bundle a bundle. If the bundle is null, this method will return null.
  @param key a key for the value.
  @return a long array value if exists, null otherwise.
  @see android.os.Bundle#getInt(String, int)