presto-spi/src/main/java/io/prestosql/spi/connector/ColumnMetadata.java/ColumnMetadata/build
class ColumnMetadata:        public ColumnMetadata build()
        {
            return new ColumnMetadata(
                    name,
                    type,
                    nullable,
                    comment.orElse(null),
                    extraInfo.orElse(null),
                    hidden,
                    properties);
        }