Dart call & noSuchMethod

callingNoSuchMethod.dart

void main() {
  final func = Callable((a)=> print(a));
  func('a');
}

class Callable {
  Function func;
  
  @override
  noSuchMethod(invocation) {
    Function.apply(func, invocation.positionalArguments, invocation.namedArguments);
  }
  
  Callable(this.func);
}