cel`. After `sec` seconds, the event loop will attempt cancellation of `tocancel` if the `tocheck` fiber is resumable. `sec` is a number that can have a fractional part. `tocancel` defaults to `(fiber/root)`, but if specified, must be a task (root fiber). `tocheck` defaults to `(fiber/current)`, but if specified, should be a fiber. Returns `tocancel` immediately.</pre><a href="https://janetdocs.org/ev/deadline">Community Examples</a></div><hr><div class="binding"><span id="ev/do-thread" class="binding-sym">