addyosmani/backbone-fundamentals — pull request #529 by zmilan (2013-12-24 10:38:31+00:00)
Title: Update 18-appendix.md

Since 'topic' is made dynamic and there is no track of it, off will never delete anything. So fast solution is to send event name (that can contain separation 'like module.part.event') and than delete all topics for it.