Map<String, Integer> marketplaceIdCountMap = amazonTemplateService .getAmazonTemplateList(query, false, false, false).stream() .collect(Collectors.groupingBy(AmazonTemplate::getMarketplaceId, Collectors.summingInt(item -> 1)));
Map<String, Integer> marketplaceIdCountMap = amazonTemplateService .getAmazonTemplateList(query, false, false, false).stream() .collect(Collectors.groupingBy(AmazonTemplate::getMarketplaceId, Collectors.summingInt(item -> 1)));