presto-hive/src/main/java/io/prestosql/plugin/hive/HiveWriterFactory.java/DataColumn/DataColumn
class DataColumn:        public DataColumn(String name, HiveType hiveType)
        {
            this.name = requireNonNull(name, "name is null");
            this.hiveType = requireNonNull(hiveType, "hiveType is null");
        }