Notify application when domain transfer is complete

[stsgil]

Hi, firstly, thank you for all the work and nice documentation.

I am looking at porting your stack on our platform, but as i'm working through it, I found a point of confusion.
Is there a method for notifying the application layer, that an object in object dictionary was modified? Is this something that is supposed to be achieved through custom type functions, or is application expected to poll for such objects?

I suppose I lack some experience in writing canopen nodes, so i'm wondering how is this usually done..