Experiment with webix.protoUI

I’m experimenting with webix.protoUI.

I tried to override the getInputNode method.
I started by copying the exact implementation found in the combo component, but it doesn’t work (this._dataobj is undefined). Why?

https://snippet.webix.com/a1q0u9k9

I expected that with protoUI I could override any method of the base component, isn’t that so?

@1be
_dataobj (and any started with underscore) is private field and is minimized in production version.
instead of _dataobj you can use identical $view