How to serialise and deserialise custom attributes

[suityou01]

I have followed the subclassing documentation as far as I can, but I have found the document tails off a bit prematurely as it only shows 'aprop' as an extra argument to the _fromObject method. It is not clear to me at all how to deserialise custom attributes.

Can you point me at an example of such?

Here is my latest fruitless attempt :

fabric.MyCustomWidget.fromObject = function(object, callback) { return fabric.Object._fromObject('Event', object, callback, { 'id': object.customAttribute1, 'name': object.customAttribute2 }); }

NB I have sucessfully written the toObject override for the subclass and it serialises the custom attributes ok.