XF 1.5 Add values to $bodyClasses?

[CyberAP]

How do you add values to $bodyClasses?

I would like to preserve what $bodyClasses actually has, rather than completely overriding its value.

Tried <xen:container> and <xen:set>. Neither did work for me. Or maybe this is not possible at all? If so what'd be the best way to push classes to container template without editing the container itself nor creating a template modification for this task.

 

[CyberAP]

I feel stupid now. $bodyClasses was already defined in the template.