docs: def sleep(seconds=0):
      """Yield control to another eligible coroutine until at least *seconds* have
      elapsed.
  
      *seconds* may be specified as an integer, or a float if fractional seconds
      are desired.
      """
      loop = evergreen.current.loop
      current = Fiber.current()
      assert loop.task is not current
      timer = loop.call_later(seconds, current.switch)
      try:
          loop.switch()
      finally:
          timer.cancel()