Get at Mixing - Er, Ere, Ere, of Listenable Objects

Get at mixing allows you to observe object that ou registerd insihde get it from. The eh, so er ou you set eftou told me before you ere using e, provided additionally in combination with get it e. Er want to observe in a eh, so in er mifky mixin this er looks like this. We have here some, some examples of listl listenable objects. I would say we have here anvalued ifer, as in clobel variable, for example. Then we have an eramodel class that exchange schange, not notifyer,. Because er, if you look here, the er, the country property