defaultCallbackDispatcher method
A helper function so you only need to implement a EchoCallbackFunction
Implementation
static void defaultCallbackDispatcher(
final EchoCallbackFunction echoFunction) {
WidgetsFlutterBinding.ensureInitialized();
_backgroundChannel
.setMethodCallHandler((call) async => echoFunction(call.arguments));
_backgroundChannel.invokeMethod("backgroundChannelInitialized");
}