@class PGGraphMomentNodeCollection, NSSet, MARelation, PGGraphMemoryNodeCollection; @interface PGGraphFeatureNodeCollection : PGGraphNodeCollection @property (class, readonly) MARelation *momentOfFeature; @property (class, readonly) MARelation *memoryOfFeature; @property (readonly, nonatomic) NSSet *featureIdentifiers; @property (readonly, nonatomic) PGGraphMomentNodeCollection *momentNodes; @property (readonly, nonatomic) PGGraphMemoryNodeCollection *memoryNodes; + (id)featureNodeCollectionWithCollection:(id)a0; + (id)featureNodeCollectionWithFeatures:(id)a0 inGraph:(id)a1; - (id)allFeatures; @end