* 
	 * @throws ReadOnlyBufferException
	 *             If this buffer is read-only
	 * 
	 * @since 1.5
	 */
	public CharBuffer append(CharSequence csq, int start, int end) {
		CharSequence cs = (csq == null ? "null" : csq);
		return put(cs.subSequence(start, end).toString());
	}