TextBlock change event on link

Is it possible to catch change event, when user edit TextBlock on Link, so I can process input data with reference to edited link? I mean something like change: function()... on TextBlock.
I can catch this changes in ModelChangedListener, but I couldn’t find way how to distinguish Node textblock change from Link textblock change, or how to get reference to clicked clicked Link in this event.

Perhaps you just want to set: TextBlock | GoJS API

Ah, I overlooked that. Thank you!