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) {
return results.isEmpty
? []
: results.length > 1
? throw _conversionException('.toString()', results)
: _isAllTypes(results)
? [false]
: [results.first.toString()];
}