Method getStyles

/*
 * Not all classes are loaded this way, only the classes which can change for different libraries like bootstrap3, bootstrap4, etc.
 */
public static function getStyles()
{
    if (empty(self::$styles)) {
        $app = Factory::getApplication();
        $pC = PhocacartUtils::getComponentParameters();
        $pos = PhocacartPos::isPos();
        $admin = $app->isClient('administrator');
        if ($pos || $admin) {
            $theme = 'bs5';
            $icons = 'fa5';
            // only icons are now active for admin
        } else {
            $theme = $pC->get('theme', 'bs5');
            $icons = $pC->get('icon_type', 'fa5');
        }
        self::$styles = self::loadStyles($theme, $icons);
    }
    return self::$styles;
}