Refer to example 5 here: https://developer.apple.com/library/ios/documentation/NetworkingInternet/Conceptual/RemoteNotificationsPG/Chapters/ApplePushService.html#//apple_ref/doc/uid/TP40008194-CH100-SW20
It uses an "actions" property that isn't listed as a valid child property of "alert" in Table 3-2 on the same page. I thought notification categories are the proper method to define custom notification actions? What is the purpose of this "actions" property?