@Override
        public ModelCreateResult createAndValidateModel(ModelContext modelContext, ValidationParameters validationParameters) {
            ModelCreateResult result = wrapped.createAndValidateModel(modelContext, validationParameters);
            creationCount++;
            return result;
        }
Returns the number of models created successfully by this instance
configserver/src/test/java/com/yahoo/vespa/config/server/deploy/DeployTester.java