Can dismiss/clear support container?

[ytnmgg]

like create:
Flash.create('success', 'Hooray!', 0, {container: 'flash-fixed'});
it's useful to name Flash by 'container'

can you enhance this tool to support 'container' in method of 'dismiss' or 'clear'?
because using name is much more easier than maintaining a list of id.

Thanks!