```ruby
class Plugins::Sidebars::XmlController < Sidebars::ComponentPlugin
  display_name "XML Syndication"
  description "RSS and Atom feeds"

  setting :articles,   true,  :input_type => :checkbox
  setting :comments,   true,  :input_type => :checkbox
  setting :trackbacks, false, :input_type => :checkbox

  setting :format, 'rss20', :input_type => :radio,
          :choices => [["rss20",  "RSS 2.0"], ["atom10", "Atom 1.0"], ["atom03", "Atom 0.3"]]
end
```

Remove Atom 0.3 from the XML sidebar, because we don't support it anymore
user
```ruby
class Plugins::Sidebars::XmlController < Sidebars::ComponentPlugin
  display_name "XML Syndication"
  description "RSS and Atom feeds"

  setting :articles,   true,  :input_type => :checkbox
  setting :comments,   true,  :input_type => :checkbox
  setting :trackbacks, false, :input_type => :checkbox

  setting :format, 'rss20', :input_type => :radio,
          :choices => [["rss20",  "RSS 2.0"], ["atom10", "Atom 1.0"]]
end
```
assistant