+ ‘custom/css/backend/skins/black.css’
+ ‘custom/css/backend/skins/blue.css’
+ ‘custom/css/backend/skins/green.css’
+ ‘custom/css/backend/skins/grey.css’
+ ‘custom/css/backend/skins/images/arrow.png’
+ ‘custom/css/backend/skins/images/arrow_off.png’
+ ‘custom/css/backend/skins/images/arrow_on.png’
+ ‘custom/css/backend/skins/images/bg_black.png’
+ ‘custom/css/backend/skins/images/bg_blue.png’
+ ‘custom/css/backend/skins/images/bg_green.png’
...