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