def respond_to?(method_name, _include_all = false)
      if attrs.key?(method_name.to_s)
        true
      else
        super(method_name)
      end
    end
def respond_to?(method_name, _include_all = false)
      if attrs.key?(method_name.to_s)
        true
      else
        super(method_name)
      end
    end
Checks if method_name is set in the attributes hash
 and returns true when found, otherwise proxies the
 call to the superclass.