lib/roar/rails/controller_additions.rb
def representer_for(format, model, options={})
      options.delete(:represent_with) || self.class.represents_options.for(format, model, controller_path)
    end
def representer_for(format, model, options={})
      options.delete(:represent_with) || self.class.represents_options.for(format, model, controller_path)
    end
Central entry-point for finding the appropriate representer.