@class PGGraphMomentNodeCollection, PGGraphLocationCountryNodeCollection, PGGraphAddressNodeCollection, PGGraphLocationStateNodeCollection, PGGraphLocationCountyNodeCollection; @interface PGGraphLocationCityNodeCollection : PGGraphNamedLocationNodeCollection @property (readonly, nonatomic) PGGraphAddressNodeCollection *addressNodes; @property (readonly, nonatomic) PGGraphMomentNodeCollection *momentNodes; @property (readonly, nonatomic) PGGraphLocationCountryNodeCollection *countryNodes; @property (readonly, nonatomic) PGGraphLocationStateNodeCollection *stateNodes; @property (readonly, nonatomic) PGGraphLocationCountyNodeCollection *countyNodes; + (Class)nodeClass; @end