execute method
The iterable, nested function that evaluates the entire FHIRPath expression one object at a time
Implementation
@override
List execute(List results, Map<String, dynamic> passed) {
// According to spec, `descendants()` is shorthand for `repeat(children())`
final repeatParser = RepeatParser();
repeatParser.value = ParserList([ChildrenParser()]);
return repeatParser.execute(results, passed);
}