how to change class of a label for checkboxes in simple_form

I wanted to give an update to this answer in case someone comes here looking for a way to do this as I did.

You can give the label a class with this option :item_wrapper_class => 'class_goes_here'

Here is a full example:

= user.input :resident, 
             :collection => [["In the U.S", true],["Outside the U.S.", false]], 
             :label_method => :first, 
             :value_method => :last,
             :as => :radio_buttons, 
             :label => "Where is your principle residence?",
             :item_wrapper_class => 'inline'