问如何判断mongoTemplate.findAndModify是进行了更新还是新增操作？

FindAndModifyOptions  findAndModifyOptions = new FindAndModifyOptions();
		findAndModifyOptions.upsert(true);
		findAndModifyOptions.returnNew(true);
MyEntity result = mongoTemplate.findAndModify(query, update, findAndModifyOptions, MyEntity.class);

return result;