(wb);
                                if ((xb.Tag == 1.000000)) {
                                    var yb = v(xb).Items[0.000000];
                                    var zb = v(xb).Items[1.000000];
                                    tb.acc = { Tag: 1.000000, Value: zb };
                                    tb.current = yb;
                                    return true;
                                }
                                else {
                                    tb.acc = { Tag: 0.000000