build method
Implementation
@override
String build(Context context, ParserResult? result) {
context.refersToStateSource = true;
final fast = result == null;
final values = context.allocateLocals(['index', 'pos']);
values.addAll({
'tag': helper.escapeString(tag),
});
return render2(fast, _templateFast, _template, values, [result]);
}