protected function constants()
{
// Script version, used to add version for scripts and styles
define('RWMB_VER', '4.9.8');
list($path, $url) = self::get_path(dirname(dirname(__FILE__)));
// Plugin URLs, for fast enqueuing scripts and styles
define('RWMB_URL', $url);
define('RWMB_JS_URL', trailingslashit(RWMB_URL . 'js'));
define('RWMB_CSS_URL', trailingslashit(RWMB_URL . 'css'));
// Plugin paths, for including files
define('RWMB_DIR', $path);
define('RWMB_INC_DIR', trailingslashit(RWMB_DIR . 'inc'));
}