The documentation seems to assume that everyone is using the PHP editor classes. PHP is hardly the only popular web language, and is not often used within corporations as often as, say, .NET or Java.
No one can expect support classes to be provided for every common language, but it sure would be nice if I didn't have to reverse-engineer the data being sent to the editor after finding the URI in the demo source code and translating it to an absolute URI that I can use to see the JSON output.
Current demos all have a "Submitted data:" and "Server response:" section. Why not a "Initial data used to actually populate the table" section?