svoid subListRangeCheck(int fromIndex, int toIndex, int size) {
  if (fromIndex < 0)
      throw new IndexOutOfBoundsException("fromIndex = " + fromIndex);
  if (toIndex > size)
      throw new IndexOutOfBoundsException("toIndex = " + toIndex);
  if (fromIndex > toIndex)
      throw new IllegalArgumentException("fromIndex(" + fromIndex +
                                         ") > toIndex(" + toIndex + ")");
}