@class _DKKnowledgeStore, _DKEventStream; @interface PRSCoreDuet : NSObject @property (retain) _DKKnowledgeStore *knowledgeStore; @property (retain) _DKEventStream *spotlightStream; - (id)getRankedCategoriesDictionaryWithPredictionWindow:(double)a0 predictionInterval:(double)a1; - (id)initWithStreamName:(id)a0; - (void).cxx_destruct; - (void)addResultCategoryAndGroupToHistory:(id)a0 groupName:(id)a1 error:(id)a2; @end