def value_for key
      method_name = value_method_name key
      if respond_to? method_name
        send(method_name).to_s
      else
        @object.send(normalized_key key).to_s
      end
    end
def value_for key
      method_name = value_method_name key
      if respond_to? method_name
        send(method_name).to_s
      else
        @object.send(normalized_key key).to_s
      end
    end
object - the instance to decorate
 Returns the Cucumber value for the given attribute key.

 If a value_for_* method is not defined for the given key,
 returns the attribute value of the decorated object,
 converted to a String.