docs: function validateURL(model, done) {
    var url = model.driver_url;
    parseURL(url, {}, function(err, result) {
      // URL parsing errors are just generic `Error` instances
      // so overwrite name so mongodb-js-server will know
      // the message is safe to display.
      if (err) {
        err.name = 'MongoError';
      }
      done(err, result);
    });
  }