def self.append_features(klass)
super
name = "#{RSS::TRACKBACK_PREFIX}_ping"
klass.add_need_initialize_variable(name)
klass.add_other_element(name)
klass.module_eval("attr_accessor :\#{name}\ndef setup_\#{name}(rss, current)\nif \#{name} and current.respond_to?(:\#{name}=)\ncurrent.\#{name} = \#{name}\nend\nend\n", __FILE__, __LINE__+1)
name = "#{RSS::TRACKBACK_PREFIX}_abouts"
klass.add_need_initialize_variable(name, "make_#{name}")
klass.add_other_element(name)
klass.module_eval("attr_accessor :\#{name}\ndef make_\#{name}\nself.class::TrackBackAbouts.new(self)\nend\n\ndef setup_\#{name}(rss, current)\n@\#{name}.to_rss(rss, current)\nend\n", __FILE__, __LINE__+1)
end