loadStructuredData<T> method
Retrieve a string from the asset bundle, parse it with the given function, and return that function's result.
The result is not cached by the default implementation; the parser is run each time the resource is fetched. However, some subclasses may implement caching (notably, subclasses of CachingAssetBundle).
Implementation
Future<T> loadStructuredData<T>(String key, Future<T> Function(String value) parser) async {
return parser(await loadString(key));
}