         
         // execute request
         gateway.request(request, serviceError: NLCError()) { data, error in
-            let classifier = Mapper<Classifier>().map(data)
+            let classifier = Mapper<Classifier>().mapData(data)
             completionHandler(classifier, error)
         }
     }

        
        // execute request
        gateway.request(request, serviceError: NLCError()) { data, error in
            let classifiers = Mapper<Classifier>().mapArray(data, keyPath: "classifiers")
            completionHandler(classifiers, error)
        }
    }

            
        // execute request
        gateway.request(request, serviceError: NLCError()) { data, error in
            let classification = Mapper<Classification>().mapData(data)
            completionHandler(classification, error)
        }
    }
