added the missing ui property

marionette/marionette.d.ts

@@ -1291,6 +1291,15 @@ declare module Marionette {
 
         options: any;
 
+		/**
+         * Behaviors can have their own ui hash, which will be mixed into the ui
+         * hash of its associated View instance. ui elements defined on either the
+         * Behavior or the View will be made available within events and triggers.
+         * They also are attached directly to the Behavior and can be accessed within
+         * Behavior methods as this.ui.
+         */
+        ui: any;
+		
         /**
          * Any triggers you define on the Behavior will be triggered in response to the appropriate event on the view.
          */