cannot 'addWizardPage' in controller script

The document shows how to add custom page in controller script:
http://doc.qt.io/qtinstallerframework/noninteractive.html#custom-pages

However, this example never works.

First of all, the example calls Controller.prototype.DynamicMyPageCallback() but DynamicMyPageCallback in Controller.prototype never defined, so it causes error on execution.

I think it should be a function definition not a function call, so I tried to change it, but no window shows up on execution.