presto-hive/src/main/java/io/prestosql/plugin/hive/s3select/S3SelectRecordCursor.java/S3SelectRecordCursor/setType
class S3SelectRecordCursor:        private void setType(String type)
        {
            checkArgument(!isNullOrEmpty(type), "type is null or empty string");
            this.type = type;
        }