int _nodes = 6;
            int _nodei = _src.index;
            _src.advance(1 * _nodes);

            if ( this.node == null ) {
                if ( _nodes < 0 || _nodes > 0xFFFF )
                    throw new NdrException(NdrException.INVALID_CONFORMANCE);
                this.node = new byte[_nodes];
            }
            _src = _src.derive(_nodei);