# File lib/dragonfly/app.rb, line 78
    def configurer_for(symbol)
      class_name = SAVED_CONFIGS[symbol]
      if class_name.nil?
        raise ArgumentError, "#{symbol.inspect} is not a known configuration - try one of #{SAVED_CONFIGS.keys.join(', ')}"
      end
      Config.const_get(class_name)
    end