@class MANodeFilter; @interface PGGraphNodeCollection : MANodeCollection @property (class, readonly, nonatomic) Class nodeClass; @property (class, readonly, nonatomic) MANodeFilter *filter; + (id)nodesInGraph:(id)a0; + (id)subsetInCollection:(id)a0; - (id)initWithSubsetInGraph:(id)a0 elementIdentifiers:(id)a1; @end