code: private function getSchemaTypes(string $driver): array
      {
          if ($driver == Driver::MYSQL) {
              return [MysqlSchema::$typeMap, MysqlSchema::$phpMap];
          }
          if ($driver == Driver::PGSQL) {
              return [PgsqlSchema::$typeMap, PgsqlSchema::$phpMap];
          }
  
          throw new \RuntimeException(sprintf('The %s schema does not support!', $driver));
      }
docs: @param string $driver
  
  @return array