     _oldValue = toContext[key]
     toContext[key] = fromContext[key]
     _noConflicts.push -> toContext[key] = _oldValue
+    return
 
   _safeSet 'applyMixin'
   _safeSet 'applyMixins'

      method.call(context) for method in onceMethods
      # - Auto-bind conventionally-named event handlers.
      if handlerNames.length then _.bindAll context, handlerNames...

    # ƒ `applyMixins`, when given a `context` (class) to decorate with `mixins`,
    # which should be passed in order of application, calls `$.applyMixin` for

    # `$.applyMixin`.
    applyMixins: (context, dependencies, mixins...) ->
      @applyMixin context, dependencies, mixin for mixin in mixins
      return

    # ƒ `createMixin`, when given a collection of `mixins`, adds a new mixin with
    # given `name` and `mixin` method collection. Conventionally, each logical
