presto-kudu/src/main/java/io/prestosql/plugin/kudu/schema/SchemaEmulationByTableNameConvention.java/SchemaEmulationByTableNameConvention/listSchemaNamesFromTablets
class SchemaEmulationByTableNameConvention:    private List<String> listSchemaNamesFromTablets(KuduClient client)
            throws KuduException
    {
        List<String> tables = client.getTablesList().getTablesList();
        LinkedHashSet<String> schemas = new LinkedHashSet<>();
        schemas.add(DEFAULT_SCHEMA);
        for (String table : tables) {
            SchemaTableName schemaTableName = fromRawName(table);
            if (schemaTableName != null) {
                schemas.add(schemaTableName.getSchemaName());
            }
        }
        return ImmutableList.copyOf(schemas);
    }