normalize_message

# File activemodel/lib/active_model/errors.rb, line 354
    def normalize_message(attribute, message, options)
      message ||= :invalid

      if message.is_a?(Symbol)
        generate_message(attribute, message, options.except(*CALLBACKS_OPTIONS))
      elsif message.is_a?(Proc)
        message.call
      else
        message
      end
    end