presto-mongodb/src/main/java/io/prestosql/plugin/mongodb/MongoMetadata.java/MongoMetadata/buildColumnHandles
class MongoMetadata:    private static List<MongoColumnHandle> buildColumnHandles(ConnectorTableMetadata tableMetadata)
    {
        return tableMetadata.getColumns().stream()
                .map(m -> new MongoColumnHandle(m.getName(), m.getType(), m.isHidden()))
                .collect(toList());
    }