unsubscribe

# File activesupport/lib/active_support/notifications/fanout.rb, line 81
      def unsubscribe(subscriber_or_name)
        @mutex.synchronize do
          case subscriber_or_name
          when String
            @string_subscribers[subscriber_or_name].clear
            clear_cache(subscriber_or_name)
            @other_subscribers.each { |sub| sub.unsubscribe!(subscriber_or_name) }
          else
            pattern = subscriber_or_name.try(:pattern)
            if String === pattern
              @string_subscribers[pattern].delete(subscriber_or_name)
              clear_cache(pattern)
            else
              @other_subscribers.delete(subscriber_or_name)
              clear_cache
            end
          end
        end
      end