setConversationDraft method
Implementation
Future<Map<dynamic, dynamic>> setConversationDraft(
    String draft, String conversationID, dynamic conversationType) async {
  final result = await promiseToFuture(ZIM
          .getInstance()!
          .setConversationDraft(draft, conversationID, conversationType))
      .catchError(_handleError);
  return _jsObjectToMap(result);
}