_set_default_values

# File lib/rss/maker/feed.rb, line 216
            def _set_default_values(&block)
              keep = {
                :id => id,
                :updated => updated,
              }
              self.id ||= link
              self.updated ||= dc_date
              super(&block)
            ensure
              self.id = keep[:id]
              self.updated = keep[:updated]
            end