Extensions in Java - What Are Extensions?

Cotland extensions are a way to add methods and properties to types that you don't control. In java, for example, if you want to merge two lists, you would write a static method on the first list as the first perameter,. And then the list you want to concatinate as the second parameter. But in Cotland, it's still creating an unoestatic method, but syntactically under the hood, it's calling getters and setters.