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('.toChars()', results)
: results.first is String
? (results.first as String).split('')
: throw _requiresString('.toChar()', results);