 
     list = subscribers[simpleName]
 
-    if list is null
+    if not list
       subscribers[simpleName] = [subscriber]
     else
       # If iterating the list (during a publish), then do a copy-on-write.

      responder = stimulusName
      stimulusName = ""

    [simpleName, namespaces...] = _.split stimulusName, '.'

    if simpleName isnt ""
      kullSubs simpleName, namespaces, responder

    return

  addSub = (stimulusName, addFirst, responder) ->
    [simpleName, namespaces...] = stimulusName.split '.'

    subscriber =
      stimulus: simpleName
