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) => results.isEmpty
? []
: results.length > 1
? throw _requiresList('.length()', results)
: results.first is String
? [(results.first as String).length]
: throw _requiresString('.length()', results);