presto-mongodb/src/main/java/io/prestosql/plugin/mongodb/MongoMetadata.java/MongoMetadata/listTables
class MongoMetadata:    private List<SchemaTableName> listTables(ConnectorSession session, SchemaTablePrefix prefix)
    {
        if (!prefix.getTable().isPresent()) {
            return listTables(session, prefix.getSchema());
        }
        return ImmutableList.of(prefix.toSchemaTableName());
    }