Return directory path of the selected Theme. See below example:
App::Config()->skinDir([Sub Part])
Example:
// return /var/www/myproject/webroot/themeroot/rainbow
$location = App::Config()->baseDir();
// return /var/www/myproject/webroot/themeroot/rainbow/images
$location = App::Config()->baseDir("/images");
See also: baseDir baseUrl filemanagerDir filemanagerUrl rootDir skinUrl