@class NSSet, PGGraphPublicEventNodeCollection; @interface PGGraphPublicEventCategoryNodeCollection : PGGraphNodeCollection @property (readonly) NSSet *categories; @property (readonly, nonatomic) PGGraphPublicEventNodeCollection *publicEventNodes; + (Class)nodeClass; + (id)publicEventCategoryNodesForCategories:(id)a0 inGraph:(id)a1; + (id)publicEventCategoryNodesForCategory:(id)a0 inGraph:(id)a1; @end