A future represents an asynchronous computation. A future is a value that may not have finished computing yet. This kind of "asynchronous value" makes it possible for a thread to continue doing useful work while it waits for the value to become available.
### The poll method The core method of future, {{gtMethod:TAsyncFuture>>#poll:}}, attempts to resolve the future into a final value. This method does not block if the value is not ready. Instead, the current task is scheduled to be woken up when it's possible to make further progress by polling again. The context passed to the poll method can provide a Waker, which is a handle for waking up the current task.
When using a future, you generally won't call poll directly, but instead {{gtMethod:TAsyncFuture>>#await}} the value.
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What do we do with the excluded, who don't agree?