Components.input.form() not showing when added to a dialog

[vaithu]

Adding a form to a dialog is not working if I use below code

Components.input.form()
                    .initializer(formLayout -> {
                        try {
                            formLayout.add(new TextField("Queue Name", mqQueue.getName(), ""));
                        } catch (MQException e) {
                            e.printStackTrace();
                            errorNotify(e.getMessage());
                        }
                    })
                    .build().getComponent());

whereas the below code is working

FormLayout layout = new FormLayout(new TextField("Queue Name", mqQueue.getName(), ""));

I'm trying to show a form in a dialog window.