def responders(*responders)
      self.responder = responders.inject(Class.new(responder)) do |klass, responder|
        responder = case responder
          when Module
            responder
          when String, Symbol
            Responders.const_get("#{responder.to_s.camelize}Responder")
          else
            raise "responder has to be a string, a symbol or a module"
          end

        klass.send(:include, responder)
        klass
      end
    end
def responders(*responders)
      self.responder = responders.inject(Class.new(responder)) do |klass, responder|
        responder = case responder
          when Module
            responder
          when String, Symbol
            Responders.const_get("#{responder.to_s.camelize}Responder")
          else
            raise "responder has to be a string, a symbol or a module"
          end

        klass.send(:include, responder)
        klass
      end
    end
Adds the given responders to the current controller's responder, allowing you to cherry-pick
 which responders you want per controller.

   class InvitationsController < ApplicationController
     responders :flash, :http_cache
   end

 Takes symbols and strings and translates them to VariableResponder (eg. :flash becomes FlashResponder).
 Also allows passing in the responders modules in directly, so you could do:

    responders FlashResponder, HttpCacheResponder

 Or a mix of both methods:

    responders :flash, MyCustomResponder