# Register an event that starts after the end of the current one.
	#
	# `delay` indicates the time between the end of the current event and the begin of the new one.
	# Use 0.0 if both events should be contiguous and not overlap.
	#
	# Returns the new event information that can be used in fluent programming.
	fun add_after(event: E, delay: Float, duration: nullable Float): EventInfo[E]
	do
		return queue.add_at(event, start + self.duration + delay, duration)
	end