any

# File actionpack/lib/action_controller/metal/mime_responds.rb, line 298
        def any(*args, &block)
          if block_given?
            if args.any? && args.none? { |a| a == @variant }
              args.each { |v| @variants[v] = block }
            else
              @variants[:any] = block
            end
          end
        end