presto-resource-group-managers/src/main/java/io/prestosql/plugin/resourcegroups/db/ResourceGroupGlobalProperties.java/Mapper/map
class Mapper:        @Override
        public ResourceGroupGlobalProperties map(ResultSet resultSet, StatementContext context)
                throws SQLException
        {
            return new ResourceGroupGlobalProperties(Optional.ofNullable(resultSet.getString("value")).map(Duration::valueOf));
        }