 </p>
                <p>
                  @li During serialization when using @ref buffer_body. The caller
                  should update the body to point to a new buffer or indicate that
                  there are no more octets in the body.
                </p>
                <p>
                  @li During parsing when using @ref buffer_body. The caller should
                  update the body to point to a new storage area to receive additional
                  body octets.
                </p>
