nativeDartTemplate function
Implementation
String nativeDartTemplate(String pluginName, String className, String annotation) => '''
import 'package:nitro/nitro.dart';
part '$pluginName.g.dart';
$annotation
abstract class $className extends HybridObject {
static final $className instance = _${className}Impl();
double add(double a, double b);
@nitroAsync
Future<String> getGreeting(String name);
}
''';