The page titled Events, which describes events declared with DECLARE_EVENT, needs a deprecation notice. It describes features of events that are unenforced and they are considered deprecated according to a comment in DelegateCombinations.h:
* Declares a multicast delegate that is meant to only be activated from OwningType
* NOTE: This behavior is not enforced and this type should be considered deprecated for new delegates, use normal multicast instead
#define DECLARE_EVENT( OwningType, EventName ) FUNC_DECLARE_EVENT( OwningType, EventName, void )
For more detail, see this github demonstration project.