Dear community.

I'm having some problems when I'm trying to inherit exportasJSON.

I'm extending module.Order, this worked for almost every method but this is not working.

I've tried:

this._super.apply(this,arguments);

and:

this._super();

But it displays some errors:

Uncaught TypeError: Cannot call method 'apply' of undefined

and

Object [object Object] has no method '_super'

Someone know why this is not working? I'm trying to add some variables to return when it calls exportAsJSON.

Thanks