I've read the excellent documentation "Using the Knockout API". That explains how the context is set of a specific widget with knockout bindings.
Now I'd like to be able to access Java models from the Firebug command line, as I would normally do when I access the ViewModel in Javascript using KnockoutJS in a browser. Firebug doesn't know about "$root", basically I don't know how, and whether it'd be possible at all, to access the Java model at all and call @Function methods. That would make for a cool REPL.
There is the ko.dataFor and ko.contextFor and it might be easier to just use
Model = ko.dataFor(document.body);