presto-kudu/src/main/java/io/prestosql/plugin/kudu/schema/SchemaEmulationByTableNameConvention.java/SchemaEmulationByTableNameConvention/existsSchema
class SchemaEmulationByTableNameConvention:    @Override
    public boolean existsSchema(KuduClient client, String schemaName)
    {
        if (DEFAULT_SCHEMA.equals(schemaName)) {
            return true;
        }
        else {
            List<String> schemas = listSchemaNames(client);
            return schemas.contains(schemaName);
        }
    }