append_features(klass) public

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# File lib/rss/slash.rb, line 23
      def append_features(klass)
        super

        return if klass.instance_of?(Module)
        klass.install_must_call_validator(SLASH_PREFIX, SLASH_URI)
        ELEMENT_INFOS.each do |name, type, *additional_infos|
          full_name = "#{SLASH_PREFIX}_#{name}"
          klass.install_text_element(full_name, SLASH_URI, "?",
                                     full_name, type, name)
        end

        klass.module_eval do
          alias_method(:slash_hit_parades, :slash_hit_parade)
          undef_method(:slash_hit_parade)
          alias_method(:slash_hit_parade, :slash_hit_parade_content)
        end
      end
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