Classes The following classes are available globally. ChannelWriter The ChannelWriter class writes values to a channel. It’s a reference type so Channels have a common object to add handlers to. See more Declaration Swift public class ChannelWriter<T> Lock A thread-safe lock around a value of type T. See more Declaration Swift public class Lock<T> Promise Promise The Promise type is a backend for the Future type. It manages completion handlers to be called in the future. Use Promise to provide a Future that you can complete. See more Declaration Swift public class Promise<T> © 2016 . All rights reserved. (Last updated: 2016-03-23) Generated by jazzy ♪♫ v0.5.0, a Realm project.