initiate method
Implementation
@override
Future<void> initiate(Map<String, dynamic> payload,
void Function(Map<String, dynamic>) callbackFn) async {
final payloadString = jsonEncode(payload);
if (_isSdkLoaded) {
_invokeCoreMethod('initiate', [payloadString]);
} else {
_eventQueue.add({'eventName': 'initiate', 'eventPayload': payloadString});
}
_callbackFn = callbackFn;
final blazeCallback = js.allowInterop(_coreCallbackHandler);
js_util.setProperty(js_util.globalThis, 'blazeCallback', blazeCallback);
}