presto-postgresql/src/main/java/io/prestosql/plugin/postgresql/PostgreSqlClient.java/PostgreSqlClient/uuidColumnMapping
class PostgreSqlClient:    private ColumnMapping uuidColumnMapping()
    {
        return ColumnMapping.sliceMapping(
                uuidType,
                (resultSet, columnIndex) -> uuidSlice((UUID) resultSet.getObject(columnIndex)),
                uuidWriteFunction());
    }