presto-accumulo/src/main/java/io/prestosql/plugin/accumulo/AccumuloMetadata.java/AccumuloMetadata/listTables
class AccumuloMetadata:    @Override
    public List<SchemaTableName> listTables(ConnectorSession session, Optional<String> filterSchema)
    {
        Set<String> schemaNames = filterSchema.<Set<String>>map(ImmutableSet::of)
                .orElseGet(client::getSchemaNames);

        ImmutableList.Builder<SchemaTableName> builder = ImmutableList.builder();
        for (String schemaName : schemaNames) {
            for (String tableName : client.getTableNames(schemaName)) {
                builder.add(new SchemaTableName(schemaName, tableName));
            }
        }
        return builder.build();
    }