@class NSString; @interface PGGraphFeatureExtractor : MARelationCollectionFeatureExtractor <PGGraphFeatureExtractorProtocol> @property (readonly, nonatomic) unsigned long long featureLength; @property (readonly) unsigned long long hash; @property (readonly) Class superclass; @property (readonly, copy) NSString *description; @property (readonly, copy) NSString *debugDescription; + (id)featureExtractorWithError:(id *)a0; - (id)initWithError:(id *)a0; @end