validate_attribute

# File lib/rss/rss.rb, line 1114
    def validate_attribute
      _attrs.each do |a_name, required, alias_name|
        value = instance_variable_get("@#{alias_name || a_name}")
        if required and value.nil?
          raise MissingAttributeError.new(tag_name, a_name)
        end
        __send__("#{alias_name || a_name}=", value)
      end
    end