lithium\core\Adaptable::_initConfig PHP Method

    protected static function _initConfig($name, $config)
    {
        $defaults = array('adapter' => null, 'filters' => array());
        return (array) $config + $defaults;
    }

 /**
  * Called when an adapter configuration is first accessed, this method sets the default
  * configuration for session handling. While each configuration can use its own session class
  * and options, this method initializes them to the default dependencies written into the class.
  * For the session key name, the default value is set to the name of the configuration.
  *
  * @param string $name The name of the adapter configuration being accessed.
  * @param array $config The user-specified configuration.
  * @return array Returns an array that merges the user-specified configuration with the
  *         generated default values.
  */
 protected static function _initConfig($name, $config)
 {
     $defaults = array('session' => array('key' => $name, 'class' => static::$_classes['session'], 'options' => array()));
     $config = parent::_initConfig($name, $config) + $defaults;
     $config['session'] += $defaults['session'];
     return $config;
 }