Is is possible to get a config looks like this?

[ntd1712]

For example, I have a config file named db.yml that contains:

db:
  default: mysql
  connections:
    mysql:
      driver: pdo_mysql
      host: localhost
      port: 3306
      dbname: forge
      user: forge
      password:
      unix_socket:
      charset: utf8
      prefix:

Then, I'll use it:

$vars = new Vars(__DIR__.'/config/db.yml');
$connection = $vars->get('db.connections[db.default]');

Is is possible to get a config looks like this?
$vars->get('db.connections[db.default]');

Instead of the normal way:
$vars->get('db.connections')[$vars->get('db.default')];