static function getAvailableExtNames()
    {
        $files = pakeFinder::type( 'file' )->name( 'options-*.yaml' )->not_name( 'options-sample.yaml' )->not_name( 'options-user.yaml' )->maxdepth( 0 )->in( self::getOptionsDir() );
        foreach ( $files as $i => $file )
        {
            $files[$i] = substr( basename( $file ), 8, -5 );
        }
        return $files;
    }