App Maker Document approval template : Add Default Approvers and notify Owner the status automatically - google-apps-script

Question

I am studying the document approval template, and added default Approvers successfully by using the code below.
App Maker Document approval template : How can I Add Default Approvers
My question is that after adding these code in app maker, function notifyApproversAboutRequest_(request) still work, but the function notifyOwnerAboutRequestRejected(request) and function notifyOwnerAboutRequestApproved_(request) do not work anymore. Can anyone tell me how to resolve the problem? Thank you!
if (requestDs.item.WorkflowStages.length === 0) {
requestDs.relations.WorkflowStages.createItem(function() {
requestDs.relations.WorkflowStages.item.Status = window.Status.Draft;
requestDs.relations.WorkflowStages.item.Type = "All";
var createDatasource =
requestDs.relations.WorkflowStages.relations.Approvers.modes.create;
var draft = createDatasource.item;
draft.Email = 'darpan.sanghavi#abc.com';
draft.Name = 'Darpan Sanghavi';
createDatasource.createItem(function(createdRecord) { });
});
requestDs.relations.WorkflowStages.createItem(function() {
requestDs.relations.WorkflowStages.item.OrderNo =
getNextOrderNumberForApprover(requestDs.item);
requestDs.relations.WorkflowStages.item.Status = window.Status.Draft;
requestDs.relations.WorkflowStages.item.Type = "All";
var createDatasource =
requestDs.relations.WorkflowStages.relations.Approvers.modes.create;
var draft = createDatasource.item;
draft.Email = 'darpan.sanghavi#xyz.com';
draft.Name = 'Darn Alarm';
createDatasource.createItem(function(createdRecord) { });
app.closeDialog();
});
}

Answer 1

I was able to resolve with these changes.
Both notifyOwnerAboutRequestRejected(request) and function notifyOwnerAboutRequestApproved_(request) are ok:
if (requestDs.item.WorkflowStages.length === 0) {
requestDs.relations.WorkflowStages.createItem(function() {
requestDs.relations.WorkflowStages.item.Status = window.Status.Draft;
requestDs.relations.WorkflowStages.item.Type = "All";
var createDatasource =
requestDs.relations.WorkflowStages.relations.Approvers.modes.create;
var draft = createDatasource.item;
draft.Email = 'Test#test.com.br';
draft.Name = 'Test';
createDatasource.createItem(function(createdRecord) { });
});
requestDs.relations.WorkflowStages.createItem(function() {
requestDs.relations.WorkflowStages.item.OrderNo =
getNextOrderNumberForApprover(requestDs.item);
requestDs.relations.WorkflowStages.item.Status = window.Status.Draft;
requestDs.relations.WorkflowStages.item.Type = "All";
var createDatasource =
requestDs.relations.WorkflowStages.relations.Approvers.modes.create;
var draft = createDatasource.item;
draft.Email = 'test2#test.com.br';
draft.Name = 'Test2';
createDatasource.createItem(function(createdRecord) { });
app.closeDialog();
});
} else {
app.closeDialog();
}
},
failure: function() {
app.closeDialog();
}
});
}
Thanks so much for your code, it solved my problem with stages.