public function createService( ServiceLocatorInterface $serviceLocator )
    {
        // Configure the definitions
        $config     = $serviceLocator->get( 'Configuration' );
        $srvConfig  = isset( $config['modules']['Grid\Core']['settings'] )
                    ? (array) $config['modules']['Grid\Core']['settings']
                    : array();
        return new Definitions( $srvConfig );
    }