Client and backend. Every class listed here is shared: the same code is compiled into your app and into your server.

package java.util.stream

Types

`interface BaseStream`	What the object stream and the three primitive ones have in common.
`interface Collector`	How `Stream.collect(Collector)` folds the elements of a stream into a result: a container to start from, a step per element, a way to merge two containers and a last step that turns the container into the result.
`class Collectors`	The common `Collector`s: into collections, maps, strings, groups and numbers.
`interface DoubleStream`	A sequence of `double` values to which operations are applied one stage at a time, evaluated lazily, one element at a time, when a terminal operation asks for them.
`interface IntStream`	A sequence of `int` values to which operations are applied one stage at a time, evaluated lazily, one element at a time, when a terminal operation asks for them.
`interface LongStream`	A sequence of `long` values to which operations are applied one stage at a time, evaluated lazily, one element at a time, when a terminal operation asks for them.
`interface Stream`	A stream here is sequential and lazy: each stage pulls one element at a time from the one before it, and only when a terminal operation asks.
`class StreamSupport`	Makes a `Stream` of a `Spliterator`: what `Collection.stream()` does, and how a library turns any `Iterable` into a stream (`StreamSupport.stream(iterable.spliterator(), false)`).