@class NSArray, MARelation; @interface PGGraphYearNodeCollection : PGGraphCalendarUnitNodeCollection @property (class, readonly) MARelation *dateOfYear; @property (readonly, nonatomic) NSArray *years; + (unsigned long long)calendarUnit; + (id)yearNodesForYear:(long long)a0 inGraph:(id)a1; - (void)enumerateYearsUsingBlock:(id /* block */)a0; @end