. . "I won???t even try to describe all the features, but just to point out a few nice things:you have an Immutable version of pretty much everythingyou get a few nice static and statically typed methods on common types like Lists, Sets, Maps, ObjectArrays, which include:easy way of creating based on return type: e.g. newArrayListtransform (way to apply functions that returns Immutable version)partitio" . .