class Async::Container::Group

def wait_for(channel)
	io = channel.in
	
	@running[io] = Fiber.current
	
	while @running.key?(io)
		# Wait for some event on the channel:
		result = Fiber.yield
		
		if result == Interrupt
			channel.interrupt!
		elsif result == Terminate
			channel.terminate!
		elsif result
			yield result
		elsif message = channel.receive
			yield message
		else
			# Wait for the channel to exit:
			return channel.wait
		end
	end
ensure
	@running.delete(io)
end