class Async::Container::Group

def wait_for_children(duration = nil)
	# This log is a big noisy and doesn't really provide a lot of useful information.
	# Console.debug(self, "Waiting for children...", duration: duration, running: @running)
	
	if !@running.empty?
		# Maybe consider using a proper event loop here:
		if ready = self.select(duration)
			ready.each do |io|
				@running[io].resume
			end
		end
	end
end